The nuclear model of the atom — Paper 1 · IGCSE Physics 0625

40 In the symbol below, A is the nucleon number and Z is the proton number. A X Z What is represented by the symbol? A an electron B a neutron C a nuclide D an X-ray

1 marks

Answer: C

This question in 0625/11 May/June 2005

37 Charged particles are emitted from the cathode of an oscilloscope. What is the name and the charge of these particles? name of particles charge of particles A electrons negative B electrons positive C protons negative D protons positive

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2005

39 An unstable nucleus has 145 neutrons and 92 protons. It emits a β-particle. How many neutrons and protons does the nucleus have after emitting the β-particle? neutrons protons A 144 92 B 144 93 C 145 91 D 145 93

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2005

40 Which particles are found in the nucleus of an atom? A neutrons and protons only B neutrons only C protons and electrons only D protons, electrons and neutrons

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2005

40 The nucleus of a neutral atom of lithium is represented by Li. 7 3 How many protons, electrons and neutrons does the atom contain? protons electrons neutrons A 7 7 3 B 3 7 3 C 3 4 4 D 3 3 4

1 marks

Answer: D

This question in 0625/11 May/June 2006

37 A beam of cathode rays passes through an electric field between two parallel plates. + + + + + + cathode rays – – – – – – In which direction is the beam deflected? A into the page B out of the page C towards the bottom of the page D towards the top of the page

1 marks

Answer: D

This question in 0625/11 May/June 2007

40 The data below relates to the nucleus of a particular neutral atom of nitrogen. proton number Z = 7 nucleon number A = 17 Which row represents the correct number of neutrons and electrons in this atom? number of neutrons number of electrons A 10 7 B 10 10 C 17 7 D 17 10

1 marks

Answer: A

This question in 0625/11 May/June 2007

40 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium? A B – – n + + + + + + n n key n = a neutron – – + = a proton – – = an electron C D (not to scale) – – – – – n n + + + + n n n n n n + + – – – – –

1 marks

Answer: C

This question in 0625/11 Oct/Nov 2007

36 In order to produce a beam of cathode rays, a heated filament is placed near to an anode in an evacuated glass vessel. evacuated glass vessel anode heated filament What is the type of charge on the anode and why is this charge chosen? charge reason A negative to attract electrons B negative to repel electrons C positive to attract electrons D positive to repel electrons

1 marks

Answer: C

This question in 0625/11 May/June 2008

38 What is a β-particle and from which part of a radioactive atom is it emitted? β-particle emitted from A electron nucleus B electron outer orbits C helium nucleus nucleus D helium nucleus outer orbits

1 marks

Answer: A

This question in 0625/11 May/June 2008

40 A particular nuclide has the symbol 37 17Cl . What is true for atoms of this nuclide? A There are 17 nucleons in the nucleus. B There are 17 protons in the nucleus. C There are 37 electrons in the nucleus. D There are 37 neutrons in the nucleus.

1 marks

Answer: B

This question in 0625/11 May/June 2008

40 A uranium 238 U nucleus emits an α-particle. 92 What are the new nucleon and proton numbers? nucleon number proton number A 238 88 B 236 90 C 234 92 D 234 90

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2008

38 A radioactive nucleus contains 138 neutrons. The nucleus emits an α-particle. How many neutrons are in the nucleus after it has emitted the α-particle? A 134 B 136 C 138 D 139

1 marks

Answer: B

This question in 0625/11 May/June 2009

40 16 N is the symbol for a particular nuclide of nitrogen. 7 How many nucleons does this nuclide contain? A 7 B 9 C 16 D 23

1 marks

Answer: C

This question in 0625/11 May/June 2009

40 How many neutrons and how many protons are contained in a nucleus of 238 U ? 92 neutrons protons A 92 146 B 146 92 C 146 238 D 238 92

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2009

35 The diagram shows a beam of cathode rays entering an electric field. – beam + In which direction is the beam deflected by the field? A downwards B upwards C into the page D out of the page

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2009

36 To create cathode rays in a vacuum, what might be a suitable potential difference to connect between the cathode and anode? A 6 V a.c. B 6 V d.c. C 600 V a.c. D 600 V d.c.

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2009

38 How many neutrons and how many protons are contained in a nucleus of 238 U ? 92 neutrons protons A 92 146 B 146 92 C 146 238 D 238 92

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2009

36 What are cathode rays? A a beam of electrons B a beam of neutrons C a beam of protons D electromagnetic waves

1 marks

Answer: A

This question in 0625/11 May/June 2010

37 A cathode-ray tube has an anode and an earthed cathode. Which row shows the charge on the anode and the temperature of the cathode? cathode anode charge temperature A negative cool B negative hot C positive cool D positive hot

1 marks

Answer: D

This question in 0625/11 May/June 2010

40 The nuclide notation for radium-226 is 226 Ra . 88 How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226

1 marks

Answer: B

This question in 0625/11 May/June 2010

36 The nuclide notation for radium-226 is 226 Ra . 88 How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226

1 marks

Answer: B

This question in 0625/12 May/June 2010

39 What are cathode rays? A a beam of electrons B a beam of neutrons C a beam of protons D electromagnetic waves

1 marks

Answer: A

This question in 0625/12 May/June 2010

40 A cathode-ray tube has an anode and an earthed cathode. Which row shows the charge on the anode and the temperature of the cathode? cathode anode charge temperature A negative cool B negative hot C positive cool D positive hot

1 marks

Answer: D

This question in 0625/12 May/June 2010

37 An electric field is set up between two parallel plates. Cathode rays are directed into this field, parallel to the plates. + cathode rays – In which direction are the cathode rays deflected by the electric field? A downwards B upwards C into the page D out of the page

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2010

40 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. central mass orbiting particles What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2010

37 An electric field is set up between two parallel plates. Cathode rays are directed into this field, parallel to the plates. + cathode rays – In which direction are the cathode rays deflected by the electric field? A downwards B upwards C into the page D out of the page

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2010

38 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. central mass orbiting particles What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2010

37 An electric field is set up between two parallel plates. Cathode rays are directed into this field, parallel to the plates. + cathode rays – In which direction are the cathode rays deflected by the electric field? A downwards B upwards C into the page D out of the page

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2010

40 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. central mass orbiting particles What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2010

36 The diagram shows a cathode-ray tube. power supply Y vacuum screen X What are the correct labels for X and for Y? X Y A negative anode positive cathode B negative cathode positive anode C positive anode negative cathode D positive cathode negative anode

1 marks

Answer: B

This question in 0625/11 May/June 2011

40 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium? A B – – n + + + + + + n n key n = a neutron – – + = a proton – – = an electron C D (not to scale) – – – – – n n + + + + n n n n n n + + – – – – –

1 marks

Answer: C

This question in 0625/11 May/June 2011

36 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium? A B – – n + + + + + + n n key n = a neutron – – + = a proton – – = an electron C D (not to scale) – – – – – n n + + + + n n n n n n + + – – – – –

1 marks

Answer: C

This question in 0625/12 May/June 2011

36 An atom of the element lithium has a nucleon number of 7 and a proton number of 3. Which diagram represents a neutral atom of lithium? A B – – n + + + + + + n n key n = a neutron – – + = a proton – – = an electron C D (not to scale) – – – – – n n + + + + n n n n n n + + – – – – –

1 marks

Answer: C

This question in 0625/13 May/June 2011

39 A beam of cathode rays passes between two parallel metal plates connected to a high-voltage d.c. power supply. Which path does the beam follow? C + + + + + + D cathode B rays A

1 marks

Answer: C

This question in 0625/13 May/June 2011

40 The diagram shows a cathode-ray tube. power supply Y vacuum screen X What are the correct labels for X and for Y? X Y A negative anode positive cathode B negative cathode positive anode C positive anode negative cathode D positive cathode negative anode

1 marks

Answer: B

This question in 0625/13 May/June 2011

37 A beam of cathode rays passes between two parallel, charged metal plates in a vacuum. cathode rays – + – + – + – + – + – + – + – + – + – + In which direction is the beam deflected? A into the page B out of the page C to the left of the page D to the right of the page

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2012

40 Which statement about a carbon nucleus represented by 14 C is correct? 6 A It contains 6 neutrons. B It contains 6 electrons. C It contains 8 protons. D It contains 14 nucleons.

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2012

37 A beam of cathode rays passes between two parallel, charged metal plates in a vacuum. cathode rays – + – + – + – + – + – + – + – + – + – + In which direction is the beam deflected? A into the page B out of the page C to the left of the page D to the right of the page

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2012

38 Which statement about a carbon nucleus represented by 14 C is correct? 6 A It contains 6 neutrons. B It contains 6 electrons. C It contains 8 protons. D It contains 14 nucleons.

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2012

37 The metal filament shown is heated by passing a current through it. This makes it hot and it releases electrons. metal filament vacuum What is the name of this process of releasing electrons? A convection B evaporation C radioactive emission D thermionic emission

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2012

40 Which of the following is not a charged particle? A α-particle B β-particle C neutron D proton

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2012

38 In a cathode-ray tube, particles are fired at a screen. What are these particles? A α-particles B electrons C neutrons D protons

1 marks

Answer: B

This question in 0625/11 May/June 2013

40 The diagram represents a carbon atom. – – – – key neutron + + + proton + + – electron + + – – What is the nucleon number (mass number) for this atom? A 6 B 8 C 14 D 20

1 marks

Answer: C

This question in 0625/11 May/June 2013

40 A nuclide is represented by the notation shown. How many nucleons are there in one atom of this nuclide? A P B Q C P + Q D P – Q

1 marks

Answer: A

This question in 0625/12 May/June 2013

37 In a cathode-ray tube, particles are fired at a screen. What are these particles? A α-particles B electrons C neutrons D protons

1 marks

Answer: B

This question in 0625/13 May/June 2013

39 The diagram represents a carbon atom. – – – – key neutron + + + proton + + – electron + + – – What is the nucleon number (mass number) for this atom? A 6 B 8 C 14 D 20

1 marks

Answer: C

This question in 0625/13 May/June 2013

38 The diagram shows a cathode-ray tube used to produce cathode rays. filament (cathode) anode + cathode-ray tube current I power supply – + – metal plates Which change would increase the deflection of the cathode rays? A decreasing the current I in the filament B increasing the current I in the filament C increasing the potential difference between the filament and the anode D increasing the potential difference between the metal plates

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2013

40 A nucleus X has 17 protons and 18 neutrons. Which notation is correct for this nucleus? A 17 X B 17 X C 18 X D 35 X 18 35 17 17

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2013

38 A radioactive substance emits a particle from the nucleus of one of its atoms. The particle consists of two protons and two neutrons. What is the name of this process? A α-emission B β-emission C γ-emission D nuclear fission

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2013

39 A nucleus X has 17 protons and 18 neutrons. Which notation is correct for this nucleus? A 17 X B 17 X C 18 X D 35 X 18 35 17 17

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2013

40 The diagram shows a cathode-ray tube used to produce cathode rays. filament (cathode) anode + cathode-ray tube current I power supply – + – metal plates Which change would increase the deflection of the cathode rays? A decreasing the current I in the filament B increasing the current I in the filament C increasing the potential difference between the filament and the anode D increasing the potential difference between the metal plates

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2013

38 The diagram shows the screen of a cathode-ray tube. Cathode rays produced behind the screen strike the screen at P. On their way to the screen, the cathode rays pass between two parallel metal plates. screen P S Which arrangement of the metal plates will cause the beam to be deflected and strike the screen at S? A B C D + – + – – + – +

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2013

40 A nucleus of helium has the symbol He. 3 2 Which diagram represents an atom of He? 3 2 A B e e p p p p p n e e key p = proton n = neutron C D e = electron e e e n n n n p e e

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2013

37 A beam of cathode rays passes between two parallel metal plates connected to a high-voltage d.c. power supply. Which path does the beam follow? metal plate B + + + + + + A cathode C rays D metal plate

1 marks

Answer: B

This question in 0625/11 May/June 2014

40 A lithium nucleus contains 3 protons and 4 neutrons. What is its nuclide notation? A 3 Li B 4 Li C 7 Li D 7 Li 4 3 3 4

1 marks

Answer: C

This question in 0625/11 May/June 2014

37 A beam of cathode rays passes between two parallel metal plates connected to a high-voltage d.c. power supply. Which path does the beam follow? metal plate B + + + + + + A cathode C rays D metal plate

1 marks

Answer: B

This question in 0625/12 May/June 2014

40 A particular nuclide of chlorine can be represented by the symbol shown. 37 C l 17 How many electrons are there in a neutral atom of this nuclide? A 17 B 20 C 37 D 54

1 marks

Answer: A

This question in 0625/12 May/June 2014

37 A lithium nucleus contains 3 protons and 4 neutrons. What is its nuclide notation? A 3 Li B 4 Li C 7 Li D 7 Li 4 3 3 4

1 marks

Answer: C

This question in 0625/13 May/June 2014

40 A beam of cathode rays passes between two parallel metal plates connected to a high-voltage d.c. power supply. Which path does the beam follow? metal plate B + + + + + + A cathode C rays D metal plate

1 marks

Answer: B

This question in 0625/13 May/June 2014

37 In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles? A α-particles B electrons C protons D tungsten atoms

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2014

40 A nuclide is represented by the symbol P X . Q How many neutrons are in one nucleus of the nuclide? A P B Q C P + Q D P – Q

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2014

39 A nuclide is represented by the symbol P X . Q How many neutrons are in one nucleus of the nuclide? A P B Q C P + Q D P – Q

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2014

40 In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles? A α-particles B electrons C protons D tungsten atoms

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2014

37 In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic emission. What are these particles? A α-particles B electrons C protons D tungsten atoms

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2014

40 Which statement about the nuclei of all atoms is correct? A They are very small compared with the size of the atoms. B They always contain the same number of protons as neutrons. C They contain electrons, neutrons and protons. D They have a total charge of zero.

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2014

37 What happens in the process of thermionic emission? A Complete molecules are emitted from the surface of a hot liquid. B Single atoms are emitted from the surface of a hot liquid. C Electrons are emitted from the surface of a hot metal. D Protons are emitted from the surface of a hot metal.

1 marks

Answer: C

This question in 0625/12 Feb/March 2015

40 A nuclide has the symbol 14 C . 6 How many protons are there in one nucleus of this nuclide? A 6 B 8 C 14 D 20

1 marks

Answer: A

This question in 0625/12 Feb/March 2015

37 The diagram shows a design for a cathode-ray tube. A tube with this design does not work. power supply heated anode vacuum cold cathode Which change should be made so that the tube works properly to produce cathode rays? A Heat the cathode instead of the anode. B Reverse the connections of the power supply. C Use air in the tube instead of a vacuum. D Use an a.c. power supply instead of a d.c. power supply.

1 marks

Answer: A

This question in 0625/11 May/June 2015

40 14 C is a nuclide of carbon. 6 What is the composition of one nucleus of this nuclide? neutrons protons A 6 8 B 6 14 C 8 6 D 14 6

1 marks

Answer: C

This question in 0625/11 May/June 2015

40 A nuclide has the symbol 22 Ne . 10 What is the proton number of a nucleus of this nuclide? A 10 B 12 C 22 D 32

1 marks

Answer: A

This question in 0625/12 May/June 2015

37 The diagram shows a cathode-ray tube. cathode-rays cathode anode Which electrode should be heated, and which electrode should be positive? heated electrode positive electrode A anode anode B anode cathode C cathode anode D cathode cathode

1 marks

Answer: C

This question in 0625/13 May/June 2015

39 The nucleus of an americium atom contains 146 neutrons and 95 protons. It decays by emitting an α-particle. How many neutrons and how many protons remain in the nucleus when this form of americium decays? number of neutrons number of protons remaining remaining A 142 93 B 142 95 C 144 93 D 144 95

1 marks

Answer: C

This question in 0625/13 May/June 2015

40 Which statement is correct for the nucleus of any atom? A The nucleus contains electrons, neutrons and protons. B The nucleus contains the same number of protons as neutrons. C The nucleus has a total charge of zero. D The nucleus is very small compared with the size of the atom.

1 marks

Answer: D

This question in 0625/13 May/June 2015

37 Which particles are emitted during thermionic emission? A atoms B electrons C neutrons D protons

1 marks

Answer: B

This question in 0625/14 May/June 2015

38 A uranium 238 U nucleus emits an α-particle. 92 What are the new nucleon and proton numbers? nucleon number proton number A 238 88 B 236 90 C 234 92 D 234 90

1 marks

Answer: D

This question in 0625/14 May/June 2015

37 The diagram shows cathode rays entering an electric field between two charged plates. + + + + + + cathode rays – – – – – – How does the path of the cathode rays change and why? A They move towards the negative plate because cathode rays have a negative charge. B They move towards the negative plate because cathode rays have a positive charge. C They move towards the positive plate because cathode rays have a negative charge. D They move towards the positive plate because cathode rays have a positive charge.

1 marks

Answer: C

This question in 0625/11 Oct/Nov 2015

38 The nuclide symbol for radioactive polonium is 210 Po . 84 A nucleus of this type of polonium emits an α-particle. What is the proton number (atomic number) of the nucleus after it has emitted the α-particle? A 82 B 83 C 84 D 85

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2015

40 The nuclide notation for radium-226 is 226 Ra . 88 How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2015

37 A beam of cathode rays enters an electric field between two charged plates. Which diagram shows a path that the rays could take? A B – – cathode cathode rays rays + + C D – – cathode cathode rays rays + +

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2015

38 Radioactive carbon-14 decays into nitrogen by emitting a β-particle. The equation below represents the decay. 14 C → N 14 7 + β Q 0 P What are the values of P and Q? P Q A 6 1 B 6 –1 C 8 1 D 8 –1

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2015

40 The nuclide notation for radium-226 is 226 Ra . 88 How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2015

37 The diagram shows a cathode-ray tube. The tube is not working. power supply cold anode air heated cathode Which change should be made to make the tube work to produce cathode rays? A Change round the connections of the power supply. B Heat the anode instead of the cathode. C Use an a.c. power supply instead of a d.c. power supply. D Use a vacuum in the tube instead of air.

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2015

38 A radioactive nucleus contains 128 nucleons. It emits a β-particle. How many nucleons are now in the nucleus? A 124 B 127 C 128 D 129

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2015

40 The nuclide notation for radium-226 is 226 Ra . 88 How many electrons orbit the nucleus of a neutral atom of radium-226? A 0 B 88 C 138 D 226

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2015

37 A nucleus of element X is represented as 56 X . 26 Which is an isotope of element X? A 26 X B 54 X C 56 X D 54 X 56 26 24 28

1 marks

Answer: B

This question in 0625/12 Feb/March 2016

38 The charge on a proton is e. What is the charge on an electron and what is the charge on a neutron? electron neutron A e e B e 0 C –e –e D –e 0

1 marks

Answer: D

This question in 0625/12 Feb/March 2016

40 Which row describes the nature of α-particles and of γ-rays? α-particles γ-rays A helium nuclei electromagnetic radiation B helium nuclei electrons C protons electromagnetic radiation D protons electrons

1 marks

Answer: A

This question in 0625/12 Feb/March 2016

37 How many neutrons are in a nucleus of the nuclide 37 C l ? 17 A 17 B 20 C 37 D 54

1 marks

Answer: B

This question in 0625/11 May/June 2016

38 A certain element has several isotopes. Which statement about these isotopes is correct? A They must have different numbers of electrons orbiting their nuclei. B They must have the same number of neutrons in their nuclei. C They must have the same number of nucleons in their nuclei. D They must have the same number of protons in their nuclei.

1 marks

Answer: D

This question in 0625/11 May/June 2016

39 A radioactive nucleus emits either an α-particle or a β-particle. What are the products of these two types of radioactive emission? product after α-emission product after β-emission A a nucleus of a different element a nucleus of a different element B a nucleus of a different element a nucleus of the same element C a nucleus of the same element a nucleus of a different element D a nucleus of the same element a nucleus of the same element

1 marks

Answer: A

This question in 0625/11 May/June 2016

37 A neutral atom consists of electrons orbiting a nucleus. The nucleus contains protons and neutrons. Which statement about the atom must be correct? A The number of electrons is equal to the number of neutrons. B The number of electrons is equal to the number of protons. C The number of neutrons is equal to the number of protons. D The number of electrons, neutrons and protons are all different.

1 marks

Answer: B

This question in 0625/12 May/June 2016

38 Below are the symbols for five different nuclides. 35 X 37 X 38 X 81 X 81 X 17 17 18 35 37 nuclide 1 nuclide 2 nuclide 3 nuclide 4 nuclide 5 Which two nuclides are isotopes of the same element? A nuclide 1 and nuclide 2 B nuclide 2 and nuclide 3 C nuclide 2 and nuclide 5 D nuclide 4 and nuclide 5

1 marks

Answer: A

This question in 0625/12 May/June 2016

37 A proton and a neutron are each close to a positive nucleus. proton + neutron positive nucleus How does the charge on the nucleus affect the proton and the neutron, if at all? A The neutron is attracted; the proton is repelled. B The neutron is not affected; the proton is repelled. C The proton is attracted; the neutron is repelled. D The proton is not affected; the neutron is repelled.

1 marks

Answer: B

This question in 0625/13 May/June 2016

38 Below are four statements about isotopes of a certain element. Which statement about the isotopes must be correct? A They are radioactive. B They are unstable. C They have the same number of neutrons. D They have the same number of protons.

1 marks

Answer: D

This question in 0625/13 May/June 2016

37 A nuclide of sodium can be represented by 23 Na. 11 Which row gives the numbers of particles in a neutral sodium atom? number of number of number of electrons protons neutrons A 11 11 12 B 12 11 23 C 12 12 11 D 23 23 11

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2016

37 A nuclide of sodium can be represented by 23 Na. 11 Which row gives the numbers of particles in a neutral sodium atom? number of number of number of electrons protons neutrons A 11 11 12 B 12 11 23 C 12 12 11 D 23 23 11

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2016

37 A nuclide of sodium can be represented by 23 Na. 11 Which row gives the numbers of particles in a neutral sodium atom? number of number of number of electrons protons neutrons A 11 11 12 B 12 11 23 C 12 12 11 D 23 23 11

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2016

38 Below are four statements about different isotopes of a certain element. Which statement must be true? A They have a different number of electrons. B They have the same number of neutrons. C They have the same number of nucleons. D They have the same number of protons.

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2016

38 The nuclide notation for an isotope of silver is 109 Ag . 47 How many nucleons are in a nucleus of this isotope? A 47 B 62 C 109 D 156

1 marks

Answer: C

This question in 0625/12 Feb/March 2017

37 Which row gives the relative charge of an electron, a neutron and a proton? electron neutron proton A –1 0 –1 B –1 0 +1 C +1 –1 0 D +1 0 +1

1 marks

Answer: B

This question in 0625/11 May/June 2017

38 An element has two isotopes. Which row compares the numbers of particles in the nuclei of the atoms of these isotopes? number of number of number of neutrons protons nucleons A different the same different B different the same the same C the same different different D the same different the same

1 marks

Answer: A

This question in 0625/11 May/June 2017

37 Which particle has a negative charge? A an alpha particle B an electron C a neutron D a proton

1 marks

Answer: B

This question in 0625/12 May/June 2017

38 The diagram represents the nucleus of an atom. The charged particles are shown. + + + Which row gives the proton number and the nucleon number for this nucleus? proton nucleon number number A 3 4 B 3 7 C 4 3 D 4 7

1 marks

Answer: B

This question in 0625/12 May/June 2017

37 Which description of a neutral atom of copper is correct? A a nucleus surrounded by electrons B a nucleus surrounded by molecules C electrons surrounded by a nucleus D electrons surrounded by molecules

1 marks

Answer: A

This question in 0625/13 May/June 2017

38 A nuclide of iodine is represented by 131 53 . I How many neutrons are in a nucleus of this nuclide? A 53 B 78 C 131 D 184

1 marks

Answer: B

This question in 0625/13 May/June 2017

38 Different isotopes of chlorine are represented as 35 C l and 37 C l . 17 17 They behave the same way chemically. Why is this? A They have the same nuclide notation. B They have the same number of neutrons. C They have the same number of nucleons. D They have the same number of protons.

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2017

38 A nuclide of radon-222 is represented by 222 Rn . 86 How many protons and how many neutrons are in a nucleus of this nuclide? protons neutrons A 86 136 B 86 222 C 222 86 D 222 136

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2017

37 Which row states the charge on an electron and states whether electrons are located inside the nucleus of an atom? located inside charge the nucleus A negative no B negative yes C positive no D positive yes

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2017

38 The element sodium, symbol Na, has a proton number of 11. Which is a possible symbol for a sodium nuclide? A 9 Na B 11 Na C 11 Na D 23 Na 11 9 23 11

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2017

37 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. orbiting central particle mass What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/11 May/June 2018

38 A neutral atom of argon-40 ( 40 A ) and a neutral atom of potassium-39 ( 39 K ) are compared. 18 19 Which atom has more electrons, and which atom has more protons? more electrons more protons A argon argon B argon potassium C potassium argon D potassium potassium

1 marks

Answer: D

This question in 0625/11 May/June 2018

37 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. orbiting central particle mass What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/12 May/June 2018

38 The table shows the composition of three different nuclei. number of number of nucleus protons neutrons X 3 3 Y 3 4 Z 4 3 Which nuclei are isotopes of the same element? A X, Y and Z B X and Y only C X and Z only D Y and Z only

1 marks

Answer: B

This question in 0625/12 May/June 2018

37 In the atomic model, an atom consists of a central mass, orbited by much smaller particles. orbiting central particle mass What is the name of the central mass and of the orbiting particles? central mass orbiting particles A neutron α-particles B neutron electrons C nucleus α-particles D nucleus electrons

1 marks

Answer: D

This question in 0625/13 May/June 2018

38 One isotope of lead is represented by the nuclide symbol 214 82Pb . How many neutrons and how many protons does one nucleus of this isotope contain? number of number of neutrons protons A 82 132 B 82 214 C 132 82 D 214 82

1 marks

Answer: C

This question in 0625/13 May/June 2018

37 Which diagram represents the structure of a neutral atom? A B C D key – – – – neutron + proton + + + + + + + + – electron – – –

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2018

38 Each nucleus of nuclide X contains 10 protons and a total of 22 nucleons. Which notation is correct for this nuclide? A 22 X B 22 X C 12 X D 10 X 10 32 10 22

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2018

37 Which diagram represents the structure of a neutral atom? A B C D key – – – – neutron + proton + + + + + + + + – electron – – –

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2018

38 The nuclide notation for the isotope lithium-7 is Li 7 . 3 How many neutrons are there in an atom of lithium-7? A 3 B 4 C 7 D 10

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2018

37 Which diagram represents the structure of a neutral atom? A B C D key – – – – neutron + proton + + + + + + + + – electron – – –

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2018

38 What is a carbon nucleus, 12 C , composed of? 6 A 6 neutrons and 6 electrons B 6 neutrons, 6 protons and 6 electrons C 6 protons and 6 electrons D 6 protons and 6 neutrons

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2018

37 Which statement about the structure of an atom is correct? A Negative electrons surround a neutral nucleus. B Negative electrons surround a positive nucleus. C Positive electrons surround a neutral nucleus. D Positive electrons surround a negative nucleus.

1 marks

Answer: B

This question in 0625/12 Feb/March 2019

38 What are isotopes of an element? A atoms of a different element with a different number of neutrons B atoms of a different element with a different number of protons C atoms of the same element with a different number of neutrons D atoms of the same element with a different number of protons

1 marks

Answer: C

This question in 0625/12 Feb/March 2019

38 Four nuclides are represented below. 6 E G 7 L 6 M 7 3 3 4 5 Which pair of nuclides are isotopes of the same element? A E and G B E and L C G and L D G and M

1 marks

Answer: A

This question in 0625/11 May/June 2019

39 A student measures the level of radiation emitted from a radioactive substance. He places a detector very close to the substance. He puts different absorbers between the radioactive substance and the detector. radioactive substance counter detector absorber The student’s results are shown. These results are corrected for background radiation. counter reading absorber counts per minute none 95 thin paper 52 few mm of aluminium 52 several cm of lead 12 Which types of radiation are being emitted by the substance? A α-particles and β-particles only B α-particles and γ-rays only C β-particles and γ-rays only D α-particles, β-particles and γ-rays

1 marks

Answer: B

This question in 0625/11 May/June 2019

38 A simple model of the atom consists of small particles orbiting a central nucleus. Which row is correct? charge on charge on nucleus orbiting particles A negative negative B negative positive C positive negative D positive positive

1 marks

Answer: C

This question in 0625/12 May/June 2019

38 Which statement about the structure of an atom is correct? A It contains positively charged particles only. B It contains negatively charged particles only. C It contains no charged particles. D It contains positively charged particles and negatively charged particles.

1 marks

Answer: D

This question in 0625/13 May/June 2019

40 A radioactive element undergoes α-decay. Which statement is not correct? A A different element is formed. B Radiation is emitted from the nucleus. C The decay is a random process. D The number of particles in the nucleus stays the same.

1 marks

Answer: D

This question in 0625/13 May/June 2019

37 Which diagram shows a possible structure of a neutral atom? A B key proton neutron electron C D

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2019

38 A nuclide of cobalt contains 27 protons and 32 neutrons. Which symbol represents this nuclide? 27 59Co 27Co 32 59Co 32 59 27Co A B C D

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2019

39 An isotope of radon is radioactive. It decays by emitting an α-particle. What happens to the nucleus of a radon atom during the emission of the α-particle? A It becomes the nucleus of a different isotope of radon with fewer neutrons. B It becomes the nucleus of a different isotope of radon with more neutrons. C It becomes the nucleus of an element with a higher proton number. D It becomes the nucleus of an element with a lower proton number.

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2019

29 A plastic rod is rubbed with a dry cloth. The rod becomes positively charged. Why has the rod become positively charged? A It has gained electrons. B It has gained neutrons. C It has lost electrons. D It has lost neutrons.

1 marks

Answer: C

This question in 0625/12 Oct/Nov 2019

37 The diagrams show the simple atomic structure for two neutral atoms X and Y of different elements. X Y Which row is correct? atom with atom with a more more electrons positively charged nucleus A X X B X Y C Y X D Y Y

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2019

38 A nuclide of chlorine has the symbol shown. 35Cl 17 What is the nucleon number of this nuclide of chlorine? A 17 B 18 C 35 D 52

1 marks

Answer: C

This question in 0625/12 Oct/Nov 2019

29 A plastic rod is rubbed with a dry cloth. The rod becomes positively charged. Why has the rod become positively charged? A It has gained electrons. B It has gained neutrons. C It has lost electrons. D It has lost neutrons.

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2019

37 The diagram represents a neutral atom. nucleus Which row identifies each type of particle in the diagram? A electron neutron proton B electron proton neutron C neutron electron proton D proton electron neutron

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2019

38 An iron nuclide is represented by the symbol shown. 56 26Fe Which statements about a nucleus of this iron nuclide are correct? 1 The nucleus contains 56 neutrons. 2 The nucleon number is 30. 3 The proton number is 26. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 3 only

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2019

39 Three types of radiation that can cause ionisation are α-, β- and γ-radiation. Which row identifies the least and the most ionising of these radiations? least most ionising ionising A α β B α γ C γ β D γ α

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2019

37 A nuclide of the element iron has the symbol shown. 56Fe 26 What does a neutral atom of this nuclide contain? protons neutrons electrons A 26 30 26 B 26 56 30 C 30 26 56 D 56 26 30

1 marks

Answer: A

This question in 0625/11 May/June 2020

38 What is the nucleon number of a nuclide? A the number of neutrons in the nucleus B the number of protons in the nucleus C the number of protons minus the number of neutrons in the nucleus D the number of protons plus the number of neutrons in the nucleus

1 marks

Answer: D

This question in 0625/11 May/June 2020

37 A nuclide of the element iron has the symbol shown. 56Fe 26 What does a neutral atom of this nuclide contain? protons neutrons electrons A 26 30 26 B 26 56 30 C 30 26 56 D 56 26 30

1 marks

Answer: A

This question in 0625/12 May/June 2020

38 Which statement about the nuclei of all atoms is correct? A They all contain electrons. B They are all always stable. C They all contain protons and electrons. D They all have a positive charge.

1 marks

Answer: D

This question in 0625/12 May/June 2020

37 A nuclide of the element iron has the symbol shown. 56Fe 26 What does a neutral atom of this nuclide contain? protons neutrons electrons A 26 30 26 B 26 56 30 C 30 26 56 D 56 26 30

1 marks

Answer: A

This question in 0625/13 May/June 2020

38 The diagram shows an early model of the structure of an atom. ball of negatively positive charged charge electron This early model is different from the atomic model accepted today. Which statement about the early model is not included in the model accepted today? A The atom is mainly filled with a ball of positive charge. B The electrons are negatively charged. C There are positive and negative charges. D There are small particles called electrons.

1 marks

Answer: A

This question in 0625/13 May/June 2020

29 What is an electric current in a metal wire? A a flow of electrons B a flow of neutrons C a flow of nucleons D a flow of protons

1 marks

Answer: A

This question in 0625/11 Oct/Nov 2020

37 Which statement is correct for the nucleus of any atom? A The nucleus contains electrons, neutrons and protons. B The nucleus contains the same number of protons as neutrons. C The nucleus has a total charge of zero. D The nucleus is very small compared with the size of the atom.

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2020

38 The nucleus of an atom X is represented by the notation shown. How many protons and how many neutrons are in this nucleus? number of number of protons neutrons A P Q B P Q – P C Q P D Q P – Q

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2020

29 A polythene rod is charged negatively by rubbing it with a cloth. Which statement explains why the rod has become charged? A The rod has gained electrons. B The rod has gained protons. C The rod has lost electrons. D The rod has lost protons.

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2020

37 Which statement is correct for the nucleus of any atom? A The nucleus contains electrons, neutrons and protons. B The nucleus contains the same number of protons as neutrons. C The nucleus has a total charge of zero. D The nucleus is very small compared with the size of the atom.

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2020

38 The symbol represents a nucleus of zinc. Which row gives the numbers of protons and neutrons in this nucleus? number of number of protons neutrons A 30 38 B 30 68 C 38 30 D 38 68

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2020

37 Which statement is correct for the nucleus of any atom? A The nucleus contains electrons, neutrons and protons. B The nucleus contains the same number of protons as neutrons. C The nucleus has a total charge of zero. D The nucleus is very small compared with the size of the atom. 234Th

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2020

38 How many protons and how many neutrons are in a nucleus of ? 90 protons neutrons A 90 144 B 90 234 C 144 90 D 234 90

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2020

37 Three students are describing the structure of an atom. student 1 All the positively charged particles are in the nucleus. student 2 Positive electrons are in the nucleus. student 3 Negative electrons orbit around the nucleus. Which students are making a correct statement? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: C

This question in 0625/12 Feb/March 2021

38 The symbol below describes a nuclide. Which row is correct? proton nucleon number (Z) number (A) A 4 5 B 4 9 C 9 4 D 9 5

1 marks

Answer: B

This question in 0625/12 Feb/March 2021

29 A student rubs a plastic rod with a cloth. The rod becomes positively charged. What has happened to the rod? A It has gained electrons. B It has gained protons. C It has lost electrons. D It has lost protons.

1 marks

Answer: C

This question in 0625/12 May/June 2021

37 The charge on a proton is e. What is the charge on an electron and what is the charge on a neutron? electron neutron A e e B e 0 C – e – e D – e 0

1 marks

Answer: D

This question in 0625/12 May/June 2021

38 The proton numbers and nucleon numbers of four nuclides are shown. 231 88Ra 232 90Th 238 92U 239 94Pu Which statement is correct? A Plutonium (Pu) contains one more proton then uranium (U). B Thorium (Th) contains one more neutron than radium (Ra). C Thorium (Th) contains one more proton than radium (Ra). D Uranium (U) contains one more neutron than plutonium (Pu).

1 marks

Answer: D

This question in 0625/12 May/June 2021

39 A radioactive atom decays by emission of a -particle. Which row is correct? what decays what happens to the atom A the nucleus of the atom it becomes a different element B the nucleus of the atom it becomes a lighter version of the same element C the outer layers of the atom it becomes a different element D the outer layers of the atom it becomes a lighter version of the same element

1 marks

Answer: A

This question in 0625/12 May/June 2021

8 Electrical energy may be obtained from nuclear fission. In which order is the energy transferred in this process? A nuclear fuel  generator  reactor and boiler  turbines B nuclear fuel  generator  turbines  reactor and boiler C nuclear fuel  reactor and boiler  generator  turbines D nuclear fuel  reactor and boiler  turbines  generator

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2021

37 A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved -particles being fired at a thin, gold foil. What happened? A All the -particles were absorbed by the nuclei of the gold atoms. B All the -particles were unaffected by the gold atoms. C Some of the -particles were attracted by the neutrons in the nuclei of the gold atoms. D Some of the -particles were repelled by the protons in the nuclei of the gold atoms.

1 marks

Answer: D

This question in 0625/11 Oct/Nov 2021

37 A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved -particles being fired at a thin, gold foil. What happened? A All the -particles were absorbed by the nuclei of the gold atoms. B All the -particles were unaffected by the gold atoms. C Some of the -particles were attracted by the neutrons in the nuclei of the gold atoms. D Some of the -particles were repelled by the protons in the nuclei of the gold atoms.

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2021

37 A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved -particles being fired at a thin, gold foil. What happened? A All the -particles were absorbed by the nuclei of the gold atoms. B All the -particles were unaffected by the gold atoms. C Some of the -particles were attracted by the neutrons in the nuclei of the gold atoms. D Some of the -particles were repelled by the protons in the nuclei of the gold atoms.

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2021

38 A nuclide has the symbol 23 Na. 11 Which statement about all atoms of this nuclide is correct? A There are 11 protons in the nucleus. B There are 23 neutrons in the nucleus. C There are 11 electrons in the nucleus. D There are 34 nucleons in the nucleus.

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2021

37 Which diagram shows the structure of an atom containing a nucleus and two orbiting electrons? A B C D + + + + – – – – 2+ 2– 2+ 2–

1 marks

Answer: C

This question in 0625/12 Feb/March 2022

38 A nuclide has the symbol 14 C. 6 Which statement about all atoms of this nuclide is correct? A There are 6 protons in the nucleus. B There are 14 neutrons in the nucleus. C There are 6 electrons in the nucleus. D There are 20 nucleons in the nucleus.

1 marks

Answer: A

This question in 0625/12 Feb/March 2022

38 A model of an atom consists of small particles orbiting a central nucleus. Where is the positive charge in an atom? A on the orbiting particles B in the nucleus C in the space between the nucleus and the orbiting particles D spread throughout the atom

1 marks

Answer: B

This question in 0625/11 May/June 2022

38 Which statement describes two atoms of different isotopes of an element? A two atoms with the same nucleon number but different proton number B two atoms with a different nucleon number but the same proton number C two atoms with the same nucleon number and the same proton number D two atoms with a different nucleon number and different proton number

1 marks

Answer: B

This question in 0625/12 May/June 2022

38 The atoms of an element can exist as different isotopes. What is the difference between atoms of different isotopes of the same element? A They have different numbers of electrons. B They have different numbers of protons and different numbers of neutrons. C They have different numbers of protons only. D They have different numbers of neutrons only.

1 marks

Answer: D

This question in 0625/13 May/June 2022

28 A plastic rod is rubbed with a dry woollen cloth. The rod becomes positively charged. Which statement is correct? A Electrons move from the cloth to the rod. B Electrons move from the rod to the cloth. C Protons move from the cloth to the rod. D Protons move from the rod to the cloth.

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2022

37 A nuclide of cobalt contains 27 protons and 32 neutrons. Which symbol represents this nuclide? 27 59Co 27Co 32 59Co 32 59 27Co A B C D

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2022

25 Copper wires are used to connect an electric circuit. Which particles flow in the wires when the circuit is switched on? A atoms B electrons C ions D neutrons

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2022

28 A plastic rod is rubbed with a dry woollen cloth. The rod becomes positively charged. Which statement is correct? A Electrons move from the cloth to the rod. B Electrons move from the rod to the cloth. C Protons move from the cloth to the rod. D Protons move from the rod to the cloth.

1 marks

Answer: B

This question in 0625/13 Oct/Nov 2022

37 A nuclide of cobalt contains 27 protons and 32 neutrons. Which symbol represents this nuclide? 27 59Co 27Co 32 59Co 32 59 27Co A B C D

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2022

38 In the processes shown, X and Y are elements. Which process describes -decay? A Atoms of X collide with atoms of Y. B Atoms of X emit atoms of Y. C Atoms of X change into ions of Y. D Atoms of X absorb -particles.

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2022

39 A high-voltage power supply is connected to a metal grid and a wire, as shown. radioactive source emitting a-particles metal grid high voltage observed When the radioactive source is placed close to the grid, sparks are observed in the position indicated. Which statement explains why the sparks are formed? A a-particles have a long range. B~ a-particles have no charge. C_ a-particles have no mass. D a-particles are strongly ionising.

1 marks

Answer: D

This question in 0625/13 Oct/Nov 2022

34 A rechargeable battery contains lithium. The lithium exists as positive lithium ions. How does an ion of lithium differ from an atom of lithium? A The ion has fewer electrons orbiting the nucleus. B The ion has more electrons orbiting the nucleus. C The nucleus of the ion has less charge. D The nucleus of the ion is more positively charged.

1 marks

Answer: A

This question in 0625/12 Feb/March 2023

35 An iron nuclide is represented by the symbol shown. 56 26Fe Which statements about a nucleus of this iron nuclide are correct? 1 The nucleus contains 56 neutrons. 2 The nucleon number is 30. 3 The proton number is 26. A 1 and 2 B 1 and 3 C 2 and 3 D 3 only

1 marks

Answer: D

This question in 0625/12 Feb/March 2023

39 The Sun has a mass of 2.0 × 1030 kg. Which element accounts for most of this mass? A carbon B hydrogen C oxygen D uranium

1 marks

Answer: B

This question in 0625/12 Feb/March 2023

34 How are positive and negative ions formed from atoms? positive ion negative ion A add positive charge to the nucleus add an electron to the atom B add positive charge to the nucleus remove positive charge from the nucleus C remove an electron from the atom add an electron to the atom D remove an electron from the atom remove positive charge from the nucleus 56 26X

1 marks

Answer: C

This question in 0625/11 May/June 2023

35 A nucleus of element X is represented as . Which is an isotope of element X? 26 X 54 X 56 X 54 X A B C D 56 26 24 28

1 marks

Answer: B

This question in 0625/11 May/June 2023

36 Which statement about the random decay of the nuclei in a sample of uranium-238 is correct? A The probabilities of an alpha-particle, a beta-particle or a gamma ray being emitted from a nucleus in the sample are equal. B The probability of a nucleus in the sample decaying decreases as time passes. C The probability of a nucleus decaying in any ten minute interval is the same for all the nuclei in the sample. D The probability of a nucleus in the sample decaying increases as time passes.

1 marks

Answer: C

This question in 0625/11 May/June 2023

34 Which diagram represents the positions of the charged particles of an atom? A B C D – + + + – + – – + – + + – – + –

1 marks

Answer: A

This question in 0625/12 May/June 2023

35 The table shows the composition of three different nuclei. number of number of nucleus protons neutrons X 3 3 Y 3 4 Z 4 3 Which nuclei are isotopes of the same element? A X, Y and Z B X and Y only C X and Z only D Y and Z only

1 marks

Answer: B

This question in 0625/12 May/June 2023

24 A plastic rod and a dry cloth are uncharged. The rod is now rubbed with the cloth and they both become charged. The rod becomes negatively charged because some charged particles move from the cloth to the rod. What is the charge on the cloth and which particles moved in the charging process? charge particles on cloth that moved A negative electrons B negative neutrons C positive electrons D positive neutrons

1 marks

Answer: C

This question in 0625/13 May/June 2023

34 An atom of an element contains electrons, neutrons and protons. Which particles are found in the nucleus? A electrons and neutrons only B electrons and protons only C neutrons and protons only D electrons, neutrons and protons

1 marks

Answer: C

This question in 0625/13 May/June 2023

35 A nuclide of chlorine has the symbol shown. 35 C l 17 What is the nucleon number of this nuclide of chlorine? A 17 B 18 C 35 D 52

1 marks

Answer: C

This question in 0625/13 May/June 2023

34 Atom P has 6 electrons, 6 protons and 6 neutrons. Atom Q has 6 electrons, 6 protons and 7 neutrons. Which statement is correct? A Atom P has atomic number 12. B Atom P has nucleon number 6. C Atom Q has nucleon number 13. D Atoms P and Q are different chemical elements.

1 marks

Answer: C

This question in 0625/11 Oct/Nov 2023

34 The diagrams represent the protons, neutrons and electrons in different atoms and ions. Which diagram shows a negatively charged ion? A B key = proton = neutron = electron C D

1 marks

Answer: D

This question in 0625/12 Oct/Nov 2023

34 What are the relative charges on a proton, a neutron and an electron? proton neutron electron A 0 –1 +1 B 0 –1 –1 C +1 0 –1 D +1 0 +1

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2023

36 Which type of radioactive decay causes the nucleus of one element to change into the nucleus of another element? emission of an emission of a emission of a alpha-particle beta-particle gamma ray

1 marks

Answer: A

This question in 0625/13 Oct/Nov 2023

30 Which statement about an atom is correct? A An atom has positive charge because there are only positive charges in the nucleus. B An atom has negative charge because there are only negative charges in the nucleus. C An atom has neutral charge because the positive charge in the nucleus equals the total negative charge of the electrons. D An atom has neutral charge because the negative charge in the nucleus equals the total positive charge of the electrons.

1 marks

Answer: C

This question in 0625/12 Feb/March 2024

31 The table gives information about four nuclei. proton nucleon nucleus number number 1 26 59 2 27 59 3 27 60 4 28 60 Which nuclei are isotopes of the same element? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: C

This question in 0625/12 Feb/March 2024

32 A simple model of the atom consists of small particles orbiting a central nucleus. Which row is correct? charge on charge on nucleus orbiting particles A negative negative B negative positive C positive negative D positive positive

1 marks

Answer: C

This question in 0625/11 May/June 2024

33 What is the charge on a proton and what is the charge on a neutron? proton neutron A +1 –1 B +1 0 C –1 +1 D –1 0

1 marks

Answer: B

This question in 0625/11 May/June 2024

34 An isotope of radon is radioactive. It decays by emitting an -particle. What happens to the nucleus of a radon atom during the emission of the -particle? A It becomes the nucleus of a different isotope of radon with fewer neutrons. B It becomes the nucleus of a different isotope of radon with more neutrons. C It becomes the nucleus of an element with a higher proton number. D It becomes the nucleus of an element with a lower proton number.

1 marks

Answer: D

This question in 0625/11 May/June 2024

35 The nuclide notation of the isotope strontium-90 is 90 Sr. 38 Which statement is correct? A A nucleus of strontium-90 has 38 neutrons. B A nucleus of strontium-90 has 52 neutrons. C A nucleus of strontium-90 has 90 electrons. D A nucleus of strontium-90 has 90 neutrons.

1 marks

Answer: B

This question in 0625/11 May/June 2024

32 Which statement about the structure of an atom is correct? A It contains positively charged particles only. B It contains negatively charged particles only. C It contains no charged particles. D It contains positively charged particles and negatively charged particles.

1 marks

Answer: D

This question in 0625/13 May/June 2024

33 A nuclide of strontium is represented by 90 Sr. 38 Which row gives the number and location of the electrons in an atom of 90 Sr? 38 number of location of electrons electrons A 38 in the nucleus B 38 surrounding the nucleus C 52 in the nucleus D 52 surrounding the nucleus

1 marks

Answer: B

This question in 0625/13 May/June 2024

34 Which diagram represents the structure of a neutral atom? A B C D key – – – – neutron + proton + + + + + + + + – electron – – –

1 marks

Answer: B

This question in 0625/11 Oct/Nov 2024

36 Radioactive decay results in the emission of -particles, -particles and -radiation. Which types of emission result in a nucleus changing to that of a different element? A -particle emission and -particle emission B -particle emission and -radiation emission C -particle emission and -radiation emission D -radiation emission only

1 marks

Answer: A

This question in 0625/12 Oct/Nov 2024

36 An element has two isotopes. Which row compares the nucleus of one atom of each isotope? the charge the mass on each nucleus of each nucleus A different different B different the same C the same different D the same the same

1 marks

Answer: C

This question in 0625/12 Feb/March 2025

36 When they lose electrons, … 1 … form … 2 … charged … 3 … . Which words correctly complete the sentence? 1 2 3 A atoms negatively ions B ions negatively atoms C atoms positively ions D ions positively atoms

1 marks

Answer: C

This question in 0625/11 May/June 2025

37 An isotope of krypton has an atomic number of 36 and a mass number of 78. What is the number of protons in a krypton nucleus? A 36 B 42 C 78 D 114

1 marks

Answer: A

This question in 0625/11 May/June 2025

33 An ion of the element oxygen is negatively charged. Which change causes the ion to become a neutral oxygen atom? A gain of electrons B gain of protons C loss of electrons D loss of protons

1 marks

Answer: C

This question in 0625/12 May/June 2025

34 A nuclide of nitrogen is represented as 15 N. 7 What is the number of neutrons in this nuclide? A 7 B 8 C 15 D 22

1 marks

Answer: B

This question in 0625/12 May/June 2025

33 An ion of the element oxygen is negatively charged. Which change causes the ion to become a neutral oxygen atom? A gain of electrons B gain of protons C loss of electrons D loss of protons

1 marks

Answer: C

This question in 0625/13 May/June 2025

34 A nuclide of nitrogen is represented as 15 N. 7 What is the number of neutrons in this nuclide? A 7 B 8 C 15 D 22

1 marks

Answer: B

This question in 0625/13 May/June 2025

34 An isotope of carbon has the nuclide notation 14 C . 6 What does the nucleus of one atom of this isotope contain? number of number of protons neutrons A 6 6 B 6 8 C 8 6 D 8 8

1 marks

Answer: B

This question in 0625/12 Oct/Nov 2025

35 Which description of the structure of an atom is correct? A a negatively charged nucleus with negatively charged electrons around it B a negatively charged nucleus with positively charged electrons around it C a positively charged nucleus with negatively charged electrons around it D a positively charged nucleus with positively charged electrons around it

1 marks

Answer: C

This question in 0625/13 Oct/Nov 2025