May/June 2026 Paper 43

2026 · 7 questions · 48 parts · 80 marks

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3(a)(i)Ionic Bonding Ionic StructuresMedium3 marks

This question is about structure and bonding. Sodium oxide is an ionic compound. Complete the dot-and-cross diagrams in Figure 3.1 to show the bonding in sodium oxide. The inner shells of electrons are shown. Show the charge on each ion.

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3(a)(ii)Ionic Bonding Ionic StructuresEasy2 marks

Sodium oxide is held together by ionic bonds. State the meaning of the term ionic bond.

3(a)(iii)Ionic Bonding Ionic StructuresMedium1 mark

The ions in sodium oxide are present in a giant ionic lattice. State the meaning of the term giant ionic lattice.

3(b)(i)Covalent BondingEasy2 marks

Oxygen, O

_{2}

, consists of simple molecules. Complete the dot–and-cross diagram in Figure 3.2 of a molecule of oxygen. Show outer shell electrons only.

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3(b)(ii)Intermolecular Forces Physical PropertiesEasy1 mark

Oxygen has a low melting point. State the general term for the weak forces of attraction that cause oxygen to have a low melting point.