A-LevelChemistryChemical periodicityFeb/Mar 2023Paper 1 Q221 Mark
V and Z are both elements in Period 3 of the Periodic Table. Each element forms one stable ion that does not contain another element. The atomic radius of each element and the ionic radius of the ion described above is shown. [Table with columns "element", "atomic radius /nm", "ionic radius /nm" and rows "V 0.186 0.095", "Z 0.099 0.181"] Which statement is correct?
AIons of V and Z have the same number of full electron shells.
BIons of Z are positively charged.
CZ has a greater electronegativity than V.
DV has more outer electrons than Z.
✓ Correct Answer
The correct answer is C: Z has a greater electronegativity than V.
📋 Examiner Report & Trap Analysis
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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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