A-LevelChemistryChemical periodicity9701/12 · Feb/Mar 2023 · Q191 Mark

Two Period 3 elements, X and Y, burn separately in oxygen to form solid oxides. The oxide of X is insoluble in water. The oxide of Y dissolves in water to form a solution which dissolves the oxide of X. What could X and Y be? [Table with columns "X", "Y"]

Aaluminium, sodium

Bmagnesium, sodium

Csilicon, phosphorus

Dsilicon, sulfur

✓ Correct answer

A: aluminium, sodium

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2023 Paper 1 Variant 2, question 19.

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