A-LevelChemistryChemical periodicity9701/12 · Oct/Nov 2022 · Q251 Mark

T is an element in Period 3. The first ionisation energy of T is lower than that of the element with one less proton. The oxide of T does not react with water. What is the identity of T?

Aaluminium

Bsilicon

Csodium

Dsulfur

✓ Correct answer

A: aluminium

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 2, question 25.

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