A-LevelChemistryAtomic structure9701/12 · May/June 2021 · Q311 Mark

In which ions are the number of electrons equal to the number of neutrons? 1 ¹⁹F⁻ 2 ³¹P³⁻ 3 ²³Na⁺

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Atomic structure, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2021 Paper 1 Variant 2, question 31.

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