A-LevelChemistryChemical periodicity9701/12 · May/June 2016 · Q121 Mark

Sodium and sulfur react together to form sodium sulfide, Na₂S. How do the atomic radius and ionic radius of sodium compare with those of sulfur? atomic radius ionic radius sodium < sulfur sodium > sulfur sodium < sulfur sodium < sulfur sodium > sulfur sodium > sulfur sodium > sulfur sodium < sulfur

Asodium < sulfur sodium > sulfur

Bsodium < sulfur sodium < sulfur

Csodium > sulfur sodium > sulfur

Dsodium > sulfur sodium < sulfur

✓ Correct answer

D: sodium > sulfur sodium < sulfur

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 12.

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