CAIE IGCSE Chemistry 2.4 Ions and Ionic Bonds Topic Practice

CourseCourseConceptConceptDocumentDocument

Covered syllabus points

2.4.1—Formation of positive ions, known as2.4.2—An ionic bond is a strong2.4.3—Formation of ionic bonds between2.4.4—Properties of ionic compounds: (a)2.4.5—Giant lattice structure of ionic2.4.6—Formation of ionic bonds between ions2.4.7—Ionic compound properties from

Question 1

[Maximum number: 1]

Magnesium reacts with oxygen to form magnesium oxide.
What happens to magnesium atoms and oxygen atoms during this reaction?

A

Magnesium and oxygen share two electrons.

B

Magnesium gains two electrons and oxygen loses two electrons.

C

Magnesium loses one electron and oxygen gains one electron.

D

Magnesium loses two electrons and oxygen gains two electrons.

Question 2

[Maximum number: 1]

Which statement describes the bonding in sodium chloride?

A

A shared pair of electrons between two atoms leading to a noble gas configuration.

B

A strong force of attraction between oppositely charged ions.

C

A strong force of attraction between two molecules.

D

A weak force of attraction between oppositely charged ions.

Question 3

[Maximum number: 1]

Chemical compounds formed from a Group I element and a Group VII element contain ionic bonds.

How are the ionic bonds formed?

A

Electrons are transferred from Group VII atoms to Group I atoms.

B

Electrons are shared between Group I atoms and Group VII atoms.

C

Electrons are lost by Group I atoms and Group VII atoms.

D

Electrons are transferred from Group I atoms to Group VII atoms.

Question 4

[Maximum number: 1]

The structures of three substances are shown.

1

1

2

2

Which substances are hard and have a high melting point?

3

3

A

1, 2 and 3

B

1 only

C

2 only

D

2 and 3 only

Question 5

[Maximum number: 1]

Which statements about potassium chloride are correct?

1 It conducts electricity when solid because its ions are free to move.
2 It has a high melting point because it has strong intermolecular forces.
3 Its structure is a giant lattice of alternating positive and negative ions.
4 It is soluble in water.

A

1 and 2

B

1 and 4

C

2 and 3

D

3 and 4

Question 6

[Maximum number: 1]

The electronic structures of two atoms, P and Q, are shown.

Figure for Question 6 — CAIE IGCSE Chemistry
Figure for Question 6 — CAIE IGCSE Chemistry

P and Q combine together to form a compound.
What is the type of bonding in the compound and what is the formula of the compound?

type of bonding

formula

ionic

PQ

ionic

PQ2\mathrm{PQ}_{2}

covalent

PQ2\mathrm{PQ}_{2}

covalent

PQ

Question 7

[Maximum number: 3]

This question is about the elements sodium and fluorine and the compound sodium fluoride.

Some properties of sodium, fluorine and sodium fluoride are shown in Table 3.1.

Table 3.1

Table 3.1

Explain in terms of structure and bonding why sodium fluoride has a much higher melting point than fluorine.

All question bank results loaded