Which row is correct? statement reason A The first ionisation energy of phosphorus is greater than that of magnesium. electron is lost from a 3p orbital in both cases B The melting point of phosphorus is greater than that of magnesium. phosphorus has more valence electrons than magnesium C The atomic radius of phosphorus is smaller than that of magnesium. phosphorus has greater nuclear charge than magnesium D The electrical conductivity of phosphorus is smaller than that of magnesium. bonding changes from ionic in magnesium to covalent in phosphorus
✓ Correct Answer
The correct answer is C: The atomic radius of phosphorus is smaller than that of magnesium. phosphorus has greater nuclear charge than magnesium
📋 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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