A-LevelChemistryChemical periodicityMay/June 2016Paper 1 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
The correct answer is D. This question tests the candidate's understanding of chemical periodicity within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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