Ionic Compounds IGCSE

Lithium is in Group I of the Periodic Table. Nitrogen is in Group V of the Periodic Table. Lithium reacts with nitrogen to form the ionic compound lithium nitride. What happens to the electrons when lithium atoms and nitrogen atoms form ions?

• A

• B

• C

• D

Potassium, K, forms a compound with fluorine, F. Which statements about this compound are correct? 1 The compound is ionic. 2 The formula of the compound is KF. 3 The compound is soluble in water.

• A 1, 2 and 3

• B 1 and 2 only

• C 1 and 3 only

• D 2 and 3 only

Compound X melts at 801°C and is a good electrical conductor when dissolved in water. Compound Y boils at 77°C, is insoluble in water and is a non-conductor of electricity. Which type of bonding is present in X and in Y?

• A

• B

• C

• D

Q+ is an ion of element Q. What has the highest value in the ion?

• A the nucleon number

• B the number of electrons

• C the number of neutrons

• D the proton number

Which substance is an ionic compound?

• A

• B

• C

• D

Sodium chloride is an ionic solid. Which statement is not correct?

• A Ions are formed when atoms lose or gain electrons.

• B Ions in sodium chloride are strongly held together.

• C Ions with the same charge attract each other.

• D Sodium chloride solution can conduct electricity.

Caesium chloride and rubidium bromide are halide compounds of Group I elements. Caesium chloride has the formula ……1……, a relative formula mass ……2…… that of rubidium bromide and bonds that are ……3…… . Which words correctly complete gaps 1, 2 and 3?

• A

• B

• C

• D

The electronic structures of two atoms, X and Y, are shown.

• A

• B

• C

• D

Element X is in Group I of the Periodic Table. X reacts with element Y to form an ionic compound. Which equation shows the process that takes place when X forms ions?

• A X + e → X+

• B X – e → X

• C X + e → X

• X – e → X+

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?

• A

• B

• C

• D