O-LevelChemistryAtomic Structure5070/12 · Oct/Nov 2014 · Q261 Mark

The diagram shows the arrangement of electrons in the atoms of four different elements. Which is the least reactive of the four elements?

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AElectron arrangement with 1 valence electron

BElectron arrangement with 8 valence electrons

CElectron arrangement with 2 valence electrons

DElectron arrangement with 7 valence electrons

✓ Correct answer

B: Electron arrangement with 8 valence electrons

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 2, question 26.

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