Ions and ionic bonds — Paper 1 · IGCSE Chemistry (9-1) 0971

6 Calcium reacts with chlorine to produce calcium chloride. What happens when a calcium ion forms during this reaction? A The calcium atom gains one electron. B The calcium atom gains two electrons. C The calcium atom loses one electron. D The calcium atom loses two electrons.

1 marks

Answer: D

This question in 0971/11 May/June 2019

24 Some properties of substance X are listed. ● It conducts electricity when molten. ● It has a high melting point. ● It burns in oxygen and the oxide dissolves in water to give a solution with pH 11. What is X? A a covalent compound B a macromolecule C a metal D an ionic compound

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2019

5 Sodium is in Group I of the Periodic Table. Chlorine is in Group VII of the Periodic Table. Sodium and chlorine combine to form a compound. Which statement about the combination of sodium and chlorine atoms is correct? A Both sodium and chlorine lose electrons. B Both sodium and chlorine gain electrons. C Sodium loses electrons and chlorine gains electrons. D Sodium gains electrons and chlorine loses electrons.

1 marks

Answer: C

This question in 0971/11 May/June 2020

5 The Group I element sodium forms an ionic bond with the Group VII element fluorine. Which two ions are produced? A Na+ and F+ B Na+ and F– C Na– and F– D Na– and F+

1 marks

Answer: B

This question in 0971/12 May/June 2020

9 Rubidium is in Group I of the Periodic Table and bromine is in Group VII. Rubidium reacts with bromine to form an ionic compound. Which row shows the electron change taking place for rubidium and the correct formula of the rubidium ion? electron change formula of ion formed A electron gained Rb+ B electron gained Rb– C electron lost Rb+ D electron lost Rb–

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2020

6 Which row describes how an ionic bond forms between a sodium atom and a chlorine atom? sodium atom chlorine atom A two electrons are lost two electrons are gained B one electron is gained one electron is lost C two electrons are gained two electrons are lost D one electron is lost one electron is gained

1 marks

Answer: D

This question in 0971/11 May/June 2021

6 Rubidium is in Group I and iodine is in Group VII of the Periodic Table. Which row describes what happens when rubidium and iodine react together to form rubidium iodide? rubidium iodine A each atom gains one electron each atom loses one electron B each atom loses one electron each atom gains one electron C each atom loses more than one electron each atom gains more than one electron D each atom neither gains each atom neither gains nor loses an electron nor loses an electron

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2021

7 Which row shows the properties for an ionic compound? electrical conductivity volatility when solid A high good B high poor C low good D low poor

1 marks

Answer: D

This question in 0971/12 Oct/Nov 2021

21 A period of the Periodic Table is shown. group I II III IV V VI VII VIII element R S T V W X Y Z The letters are not their chemical symbols. Which statement is correct? A Element R does not conduct electricity. B Elements R and Y react together to form an ionic compound. C Element Z exists as a diatomic molecule. D Element Z reacts with element T.

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2021

7 What happens to an atom when it becomes an ion with a charge of +1? A It gains an electron. B It gains a proton. C It loses an electron. D It loses a proton.

1 marks

Answer: C

This question in 0971/11 May/June 2022

6 Which statement about ions and ionic bonding is correct? A Caesium atoms gain electrons to form negatively charged caesium ions. B Ionic bonding involves sharing of pairs of electrons. C Potassium ions and chloride ions have the same number of outer-shell electrons. D Sodium ions have an equal number of protons and electrons.

1 marks

Answer: C

This question in 0971/12 May/June 2022

6 Which statement about compounds is correct? A Covalent compounds are less volatile than ionic compounds. B Covalent compounds conduct electricity when they are solid. C Ionic compounds conduct electricity when molten. D Ionic compounds are insoluble in water.

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2022

5 Which row shows the properties of an ionic compound? electrical melting point conductivity / °C of solid A good 98 B good 3652 C poor 78 D poor 801

1 marks

Answer: D

This question in 0971/11 May/June 2023

25 The diagram represents the structure of a solid. sodium chloride \ \ & x

1 marks

Answer: B

This question in 0971/11 May/June 2023

4 Which row describes properties of lithium fluoride? electrical conductivity electrical conductivity melting point when solid when molten A does not conduct conducts high B does not conduct does not conduct low C conducts conducts high D conducts does not conduct low

1 marks

Answer: A

This question in 0971/12 May/June 2023

5 Potassium reacts with iodine to form potassium iodide. Which statement about potassium iodide is correct? A Each potassium atom shares a pair of electrons with an iodine atom. B In potassium iodide, the particles of potassium have more protons than electrons. C Potassium iodide has a high melting point because it is a covalent compound. D Potassium iodide has a low melting point because it is an ionic compound.

1 marks

Answer: B

This question in 0971/12 Oct/Nov 2023

4 Some properties of substances W, X, Y and Z are shown. melting point/°C electrical conductivity W 801 conducts when molten X –182 does not conduct Y 840 conducts when solid Z 501 conducts when molten Which substances are ionic? A W, X and Y B W and Y only C W and Z D X and Z

1 marks

Answer: C

This question in 0971/11 May/June 2024

5 Atoms lose or gain electrons to become ions. Which row is correct? change to the atom type of ion charge on ion A loss of two electrons cation 2– B loss of one electron anion 1– C gain of three electrons anion 3– D gain of one electron cation 1–

1 marks

Answer: C

This question in 0971/11 May/June 2024

3 Which statement is correct? A Air is a mixture of gaseous elements only. B Alloys are formed when a metal is ionically bonded to other elements. C Carbon dioxide is a mixture of carbon and oxygen. D Potassium bromide is an ionic compound.

1 marks

Answer: D

This question in 0971/12 May/June 2024

7 The electronic configurations of four atoms, W, X, Y and Z, are shown. electronic atom configuration W 2 X 2,6 Y 2,8,2 Z 2,8,6 Which atoms form an ion with a charge of 2– when they react? A W and Y B W only C X and Z D Y only

1 marks

Answer: C

This question in 0971/12 May/June 2024

6 Which statements about potassium iodide are correct? 1 It is formed from potassium anions and iodide cations. 2 It is a good electrical conductor when molten or in aqueous solution. 3 Potassium atoms share electrons with iodine atoms. A 1 and 3 B 1 only C 2 and 3 D 2 only

1 marks

Answer: D

This question in 0971/11 May/June 2025

7 When sodium chloride is formed from its elements, each chlorine atom … 1 … one … 2 … . Which words correctly complete gaps 1 and 2? 1 2 A gains electron B gains proton C loses electron D loses proton

1 marks

Answer: A

This question in 0971/12 May/June 2025

5 The diagram shows the electronic configuration of a particle with a nucleon number of 40. 40 The table shows the suggestions that three students, 1, 2 and 3, made to identify the particle. student 1 2 3 particle Ar Cl Ca2+ Which students are correct? 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 0971/12 Oct/Nov 2025

7 The electronic configurations of atoms Q and R are shown. Q R Q and R form an ionic compound. What is the formula of the compound? A R7Q B R4Q2 C RQ D RQ7

1 marks

Answer: C

This question in 0971/12 Oct/Nov 2025