A-LevelChemistryChemical periodicity9701/12 · Oct/Nov 2025 · Q71 Mark

X and Y are different elements in Period 3. Atoms of X and Y each have only one completely filled orbital in their highest occupied energy sub-shell. Y has a greater first ionisation energy than X. Which row shows the structure and bonding in X and Y?

Agiant metallic, giant metallic

Bgiant metallic, simple molecular

Cgiant covalent, simple molecular

Dsimple molecular, simple molecular

✓ Correct answer

B: giant metallic, simple molecular

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 2, question 7.

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