A-LevelChemistryAtomic structure9701/12 · May/June 2018 · Q321 Mark

In which pairs do both species have the same number of electrons? 1 ³⁵Cl and ³⁷Cl 2 ³⁵Cl⁻ and ⁴⁰Ar 3 ⁴⁰Ar and ⁴⁰K⁺

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

A: 1, 2 and 3 are correct

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Topic: Atomic structure, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 32.

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