A-LevelChemistryAtomic structure9701/12 · Oct/Nov 2025 · Q21 Mark

Which equation has an energy change that is equal to the first ionisation energy of bromine?

ABr(g) → Br*(g) + e¯

BBr(g) → Br¯(g) e

C+Br2(g) → Br*(g) + e¯

D+ Br2(g) → Br¯(g) e

✓ Correct answer

A: Br(g) → Br*(g) + e¯

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

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