O-LevelChemistryBonding & Structure5070/12 · Oct/Nov 2018 · Q71 Mark

One atom of element X and two atoms of element Y react to form an ionic compound. Element X forms a positive ion. Which elements could X and Y be?

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Acalcium, chlorine

Bcalcium, oxygen

Csodium, chlorine

Dsodium, oxygen

✓ Correct answer

A: calcium, chlorine

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2018 Paper 1 Variant 2, question 7.

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