Practice MCQsBuild a paperTopical banksYearly papersBuild a paperPricing
Topical›Sciences - Co-ordinated (Double) 0654›Atoms, elements and compounds›Atomic structure and the Periodic Table›Paper 1

Atomic structure and the Periodic Table — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

C2.2· 38 questions · 38 marks · 46 min · 2006–2025· Multiple choice

Every Cambridge IGCSE Sciences - Co-ordinated (Double) Paper 1 question on atomic structure and the periodic table, laid out as 8 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.

QuestionsMark scheme
Different topic or paper

Questions8 pages

Question 1: Which row in the table shows the relative charge of an electron and of a neutron? electron neutron A +1 0 B +1 –1 C –1 0 D –1 +1Question 2: A silver coin contains the same number of atoms as a gold coin. Is the mass, and number of electrons, the same for the two coins? number …Question 3: The proton number of element X is 44. Its nucleon number is 145. How many neutrons are there in an atom of X? A 44 B 101 C 145 D 189Question 4: Anatom has 2 electrons in its outer shell. Which element could this atom be? Ca He 00o DM > ~~ KKM ~*~ K &® OKQuestion 5: Element X has a proton number of 24 and a nucleon number of 52. How many electrons and neutrons are there in an atom of X? electrons neutro…1 / 8
Question 6: The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B CQuestion 7: The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B CQuestion 8: The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B CQuestion 9: The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton onl…2 / 8
Question 10: The symbol for an atom of neon is 20 Ne. 10 Which statement about the atom is correct? A It contains half as many neutrons as protons. B It…Question 11: The symbol for an atom of neon is 20 Ne. 10 Which statement about the atom is correct? A It contains half as many neutrons as protons. B It…Question 12: Atoms of element X have 11 nucleons and 6 neutrons. What is element X? A boron B carbon C chlorine D sodiumQuestion 13: Atoms of element X have 11 nucleons and 6 neutrons. What is element X? A boron B carbon C chlorine D sodiumQuestion 14: The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton onl…3 / 8
Question 15: The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton onl…Question 16: The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton onl…Question 17: The diagram represents the structure of a lithium atom. Which particle is represented by ? A electron B neutron C nucleus D proton4 / 8
Question 18: Which statement about the Periodic Table is correct? A Elements are listed in order of neutron number. B Elements are listed in order of nu…Question 19: Which statements about atomic structure are correct? 1 A neutron is a particle with negligible mass. 2 The nucleus is at the centre of the …Question 20: Which row describes the relative charges on a proton and on an electron? proton electron A –1 –1 B –1 0 C +1 –1 D +1 0Question 21: An atom of sodium is represented by 23 Na. 11 Which row shows the number of protons and the number of neutrons in this atom? number of numb…Question 22: Which row shows the particles in the nucleus of an atom of 25 Mg ? 12 protons neutrons A 12 12 B 12 13 C 13 12 D 13 135 / 8
Question 23: The protons, neutrons and electrons in a particle are shown. key proton neutron electron Which symbol represents this particle? A F B F – C…Question 24: An atom of beryllium is represented by Be. 9 4 How many neutrons are in the nucleus of this type of beryllium atom? A 4 B 5 C 9 D 13Question 25: An atom of fluorine is represented by 19 9F. How many electrons does this atom contain? A 9 B 10 C 19 D 28Question 26: An atom of an element contains 9 protons, 10 neutrons and 9 electrons. What is the nucleon number (mass number) of this element? A 9 B 10 C…Question 27: Which row describes an atom that has the nucleon number 24? number of number of number of protons neutrons electrons A 8 8 8 B 12 12 12 C 2…Question 28: An atom of osmium is represented by 190 76Os. How many neutrons are in this atom? A 76 B 114 C 190 D 266Question 29: An atom of osmium is represented by 190 76Os. How many neutrons are in this atom? A 76 B 114 C 190 D 2666 / 8
Question 30: The nucleon number of a hydrogen atom is 1. What is present inside the nucleus of this atom? A one proton and one electron B one proton and…Question 31: Which row shows the particles in the nucleus of an atom of 25 Mg? 12 protons neutrons A 12 12 B 12 13 C 13 12 D 13 13Question 32: Which statement about atoms is correct? A All atoms contain equal numbers of neutrons and protons. B All atoms of the same element have the…Question 33: Which statement about atoms is correct? A All atoms contain equal numbers of neutrons and protons. B All atoms of the same element have the…Question 34: An atom of phosphorus has a nucleon number of 31 and a proton number of 15. How many neutrons are there in this atom? A 15 B 16 C 31 D 46Question 35: Which row describes particles present in Mg 25 2+? 12 neutrons electrons A 12 10 B 12 12 C 13 12 D 13 107 / 8
Question 36: Which row describes particles present in Mg 25 2+? 12 neutrons electrons A 12 10 B 12 12 C 13 12 D 13 10Question 37: Atoms consist of protons, neutrons and electrons. Which statement is correct? A An electron has a relative mass of 1 and a negative charge.…Question 38: Atoms consist of protons, neutrons and electrons. Which statement is correct? A An electron has a relative mass of 1 and a negative charge.…8 / 8

Mark scheme38 answers

Answers below. Sit the paper first if you are practising.

Pastlit

Sciences - Co-ordinated (Double) 0654 · Atomic structure and the Periodic Table — Paper 1

IGCSE · topical answer key — answer key (teacher use)

Question

Answer

Marks

1C1
2D1
3B1
4A1
5A1
6D1
7D1
8D1
9C1
10C1
11C1
12A1
13A1
14C1
15C1
16C1
17A1
18C1
19C1
20C1
21A1
22B1
23B1
24B1
25A1
26C1
27B1
28B1
29B1
30C1
31B1
32D1
33D1
34B1
35D1
36D1
37B1
38B1
1 / 1
QuestionAnswerMarksFrom
1C10654/11 Oct/Nov 2006
2D10654/11 May/June 2007
3B10654/11 Oct/Nov 2007
4A10654/11 Oct/Nov 2007
5A10654/11 Oct/Nov 2008
6D10654/11 May/June 2011
7D10654/12 May/June 2011
8D10654/13 May/June 2011
9C10654/11 May/June 2012
10C10654/12 May/June 2012
11C10654/13 May/June 2012
12A10654/11 May/June 2013
13A10654/13 May/June 2013
14C10654/11 Oct/Nov 2015
15C10654/12 Oct/Nov 2015
16C10654/13 Oct/Nov 2015
17A10654/11 May/June 2016
18C10654/11 Oct/Nov 2016
19C10654/13 Oct/Nov 2016
20C10654/13 May/June 2017
21A10654/13 Oct/Nov 2018
22B10654/12 May/June 2020
23B10654/13 Oct/Nov 2021
24B10654/13 May/June 2022
25A10654/11 Oct/Nov 2022
26C10654/12 Oct/Nov 2022
27B10654/11 May/June 2023
28B10654/12 May/June 2023
29B10654/13 May/June 2023
30C10654/11 Oct/Nov 2023
31B10654/12 Feb/March 2024
32D10654/12 May/June 2024
33D10654/13 May/June 2024
34B10654/11 May/June 2025
35D10654/12 May/June 2025
36D10654/13 May/June 2025
37B10654/12 Oct/Nov 2025
38B10654/13 Oct/Nov 2025

Another paper, or another topic

Paper
Paper 138 questionsPaper 216 questionsPaper 337 questionsPaper 430 questions

All of Atoms, elements and compounds →

Questions as text

Q1 · Which row in the table shows the relative charge of an electron and of a neutron? 0654/11 Oct/Nov 2006

14 Which row in the table shows the relative charge of an electron and of a neutron? electron neutron A +1 0 B +1 –1 C –1 0 D –1 +1

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2006

Q2 · A silver coin contains the same number of atoms as a gold coin 0654/11 May/June 2007

15 A silver coin contains the same number of atoms as a gold coin. Is the mass, and number of electrons, the same for the two coins? number of electrons v v x v x

1 marks

Answer: D

This question in 0654/11 May/June 2007

Q3 · The proton number of element X is 44 0654/11 Oct/Nov 2007

14 The proton number of element X is 44. Its nucleon number is 145. How many neutrons are there in an atom of X? A 44 B 101 C 145 D 189

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2007

Q4 · Anatom has 2 electrons in its outer shell 0654/11 Oct/Nov 2007

15 Anatom has 2 electrons in its outer shell. Which element could this atom be? Ca He 00o DM > ~~ KKM ~*~ K &® OK

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2007

Q5 · Element X has a proton number of 24 and a nucleon number of 52 0654/11 Oct/Nov 2008

14 Element X has a proton number of 24 and a nucleon number of 52. How many electrons and neutrons are there in an atom of X? electrons neutrons A 24 28 B 24 52 C 28 24 D 28 52

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2008

Q6 · The diagram shows part of the Periodic Table 0654/11 May/June 2011

27 The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B C

1 marks

Answer: D

This question in 0654/11 May/June 2011

Q7 · The diagram shows part of the Periodic Table 0654/12 May/June 2011

25 The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B C

1 marks

Answer: D

This question in 0654/12 May/June 2011

Q8 · The diagram shows part of the Periodic Table 0654/13 May/June 2011

25 The diagram shows part of the Periodic Table. Which element has atoms containing three electrons in the outer shell? A D B C

1 marks

Answer: D

This question in 0654/13 May/June 2011

Q9 · The diagram shows a helium atom 0654/11 May/June 2012

15 The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton only B electron and neutron only C proton and neutron only D electron, proton and neutron

1 marks

Answer: C

This question in 0654/11 May/June 2012

Q10 · The symbol for an atom of neon is 20 Ne 0654/12 May/June 2012

15 The symbol for an atom of neon is 20 Ne. 10 Which statement about the atom is correct? A It contains half as many neutrons as protons. B It contains twice as many neutrons as protons. C The number of neutrons equals the number of protons. D The total number of neutrons and protons is thirty.

1 marks

Answer: C

This question in 0654/12 May/June 2012

Q11 · The symbol for an atom of neon is 20 Ne 0654/13 May/June 2012

15 The symbol for an atom of neon is 20 Ne. 10 Which statement about the atom is correct? A It contains half as many neutrons as protons. B It contains twice as many neutrons as protons. C The number of neutrons equals the number of protons. D The total number of neutrons and protons is thirty.

1 marks

Answer: C

This question in 0654/13 May/June 2012

Q12 · Atoms of element X have 11 nucleons and 6 neutrons 0654/11 May/June 2013

15 Atoms of element X have 11 nucleons and 6 neutrons. What is element X? A boron B carbon C chlorine D sodium

1 marks

Answer: A

This question in 0654/11 May/June 2013

Q13 · Atoms of element X have 11 nucleons and 6 neutrons 0654/13 May/June 2013

15 Atoms of element X have 11 nucleons and 6 neutrons. What is element X? A boron B carbon C chlorine D sodium

1 marks

Answer: A

This question in 0654/13 May/June 2013

Q14 · The diagram shows a helium atom 0654/11 Oct/Nov 2015

16 The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton only B electron and neutron only C proton and neutron only D electron, proton and neutron

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2015

Q15 · The diagram shows a helium atom 0654/12 Oct/Nov 2015

16 The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton only B electron and neutron only C proton and neutron only D electron, proton and neutron

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2015

Q16 · The diagram shows a helium atom 0654/13 Oct/Nov 2015

15 The diagram shows a helium atom. e p n n p e Which particles in the helium atom have approximately the same mass? A electron and proton only B electron and neutron only C proton and neutron only D electron, proton and neutron

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2015

Q17 · The diagram represents the structure of a lithium atom 0654/11 May/June 2016

15 The diagram represents the structure of a lithium atom. Which particle is represented by ? A electron B neutron C nucleus D proton

1 marks

Answer: A

This question in 0654/11 May/June 2016

Q18 · Which statement about the Periodic Table is correct? 0654/11 Oct/Nov 2016

22 Which statement about the Periodic Table is correct? A Elements are listed in order of neutron number. B Elements are listed in order of nucleon number. C Elements are listed in order of proton number. D Elements are listed in order of relative atomic mass.

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2016

Q19 · Which statements about atomic structure are correct? 0654/13 Oct/Nov 2016

15 Which statements about atomic structure are correct? 1 A neutron is a particle with negligible mass. 2 The nucleus is at the centre of the atom and contains only protons and neutrons. 3 The nucleon number is the total number of protons and neutrons in an atom. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2016

Q20 · Which row describes the relative charges on a proton and on an electron? 0654/13 May/June 2017

14 Which row describes the relative charges on a proton and on an electron? proton electron A –1 –1 B –1 0 C +1 –1 D +1 0

1 marks

Answer: C

This question in 0654/13 May/June 2017

Q21 · An atom of sodium is represented by 23 Na 0654/13 Oct/Nov 2018

16 An atom of sodium is represented by 23 Na. 11 Which row shows the number of protons and the number of neutrons in this atom? number of number of protons neutrons A 11 12 B 11 23 C 12 11 D 12 23

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2018

Q22 · Which row shows the particles in the nucleus of an atom of 25 Mg ? 0654/12 May/June 2020

15 Which row shows the particles in the nucleus of an atom of 25 Mg ? 12 protons neutrons A 12 12 B 12 13 C 13 12 D 13 13

1 marks

Answer: B

This question in 0654/12 May/June 2020

Q23 · The protons, neutrons and electrons in a particle are shown 0654/13 Oct/Nov 2021

14 The protons, neutrons and electrons in a particle are shown. key proton neutron electron Which symbol represents this particle? A F B F – C Ne D Ne+

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2021

Q24 · An atom of beryllium is represented by Be 0654/13 May/June 2022

40 An atom of beryllium is represented by Be. 9 4 How many neutrons are in the nucleus of this type of beryllium atom? A 4 B 5 C 9 D 13

1 marks

Answer: B

This question in 0654/13 May/June 2022

Q25 · An atom of fluorine is represented by 19 9F 0654/11 Oct/Nov 2022

15 An atom of fluorine is represented by 19 9F. How many electrons does this atom contain? A 9 B 10 C 19 D 28

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2022

Q26 · An atom of an element contains 9 protons, 10 neutrons and 9 electrons 0654/12 Oct/Nov 2022

15 An atom of an element contains 9 protons, 10 neutrons and 9 electrons. What is the nucleon number (mass number) of this element? A 9 B 10 C 19 D 28

1 marks

Answer: C

This question in 0654/12 Oct/Nov 2022

Q27 · Which row describes an atom that has the nucleon number 24? 0654/11 May/June 2023

16 Which row describes an atom that has the nucleon number 24? number of number of number of protons neutrons electrons A 8 8 8 B 12 12 12 C 21 24 21 D 24 28 24

1 marks

Answer: B

This question in 0654/11 May/June 2023

Q28 · An atom of osmium is represented by 190 76Os 0654/12 May/June 2023

16 An atom of osmium is represented by 190 76Os. How many neutrons are in this atom? A 76 B 114 C 190 D 266

1 marks

Answer: B

This question in 0654/12 May/June 2023

Q29 · An atom of osmium is represented by 190 76Os 0654/13 May/June 2023

16 An atom of osmium is represented by 190 76Os. How many neutrons are in this atom? A 76 B 114 C 190 D 266

1 marks

Answer: B

This question in 0654/13 May/June 2023

Q30 · The nucleon number of a hydrogen atom is 1 0654/11 Oct/Nov 2023

16 The nucleon number of a hydrogen atom is 1. What is present inside the nucleus of this atom? A one proton and one electron B one proton and one neutron C one proton only D one neutron only

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2023

Q31 · Which row shows the particles in the nucleus of an atom of 25 Mg? 0654/12 Feb/March 2024

15 Which row shows the particles in the nucleus of an atom of 25 Mg? 12 protons neutrons A 12 12 B 12 13 C 13 12 D 13 13

1 marks

Answer: B

This question in 0654/12 Feb/March 2024

Q32 · Which statement about atoms is correct? 0654/12 May/June 2024

14 Which statement about atoms is correct? A All atoms contain equal numbers of neutrons and protons. B All atoms of the same element have the same number of neutrons. C The Periodic Table lists atoms in order of increasing mass number. D The smallest unit of an element is an atom.

1 marks

Answer: D

This question in 0654/12 May/June 2024

Q33 · Which statement about atoms is correct? 0654/13 May/June 2024

14 Which statement about atoms is correct? A All atoms contain equal numbers of neutrons and protons. B All atoms of the same element have the same number of neutrons. C The Periodic Table lists atoms in order of increasing mass number. D The smallest unit of an element is an atom.

1 marks

Answer: D

This question in 0654/13 May/June 2024

Q34 · An atom of phosphorus has a nucleon number of 31 and a proton number of 15 0654/11 May/June 2025

15 An atom of phosphorus has a nucleon number of 31 and a proton number of 15. How many neutrons are there in this atom? A 15 B 16 C 31 D 46

1 marks

Answer: B

This question in 0654/11 May/June 2025

Q35 · Which row describes particles present in Mg 25 2+? 0654/12 May/June 2025

14 Which row describes particles present in Mg 25 2+? 12 neutrons electrons A 12 10 B 12 12 C 13 12 D 13 10

1 marks

Answer: D

This question in 0654/12 May/June 2025

Q36 · Which row describes particles present in Mg 25 2+? 0654/13 May/June 2025

14 Which row describes particles present in Mg 25 2+? 12 neutrons electrons A 12 10 B 12 12 C 13 12 D 13 10

1 marks

Answer: D

This question in 0654/13 May/June 2025

Q37 · Atoms consist of protons, neutrons and electrons 0654/12 Oct/Nov 2025

15 Atoms consist of protons, neutrons and electrons. Which statement is correct? A An electron has a relative mass of 1 and a negative charge. B A proton has a relative mass of 1 and a positive charge. C A proton has a relative mass of less than 1 and a negative charge. D A neutron has a relative mass of less than 1 and no charge.

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2025

Q38 · Atoms consist of protons, neutrons and electrons 0654/13 Oct/Nov 2025

15 Atoms consist of protons, neutrons and electrons. Which statement is correct? A An electron has a relative mass of 1 and a negative charge. B A proton has a relative mass of 1 and a positive charge. C A proton has a relative mass of less than 1 and a negative charge. D A neutron has a relative mass of less than 1 and no charge.

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2025