A-LevelChemistryAtomic structure9701/12 · May/June 2016 · Q21 Mark

Four electronic configurations are shown below. Three of these configurations belong to atoms of the elements chlorine, sodium and vanadium. Which electronic configuration belongs to an atom of another element?

A1s²2s²2p⁶3s¹

B1s²2s²2p⁶3s²3p⁵

C1s²2s²2p⁶3s²3p⁶3d³4s²

D1s²2s²2p⁶3s²3p⁶3d⁶4s²

✓ Correct answer

D: 1s²2s²2p⁶3s²3p⁶3d⁶4s²

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Topic: Atomic structure, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 2.

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