A-LevelChemistryAtomic structure9701/12 · Oct/Nov 2020 · Q311 Mark

The symbol for a phosphorus ion is ¹⁵³³P³⁻. The symbol for a potassium ion is ¹⁹³⁷K⁺. What do these two ions have in common? 1 the same number of electrons 2 the same number of neutrons 3 the same number of protons

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, Oct/Nov 2020 Paper 1 Variant 2, question 31.

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