A-LevelChemistryChemical periodicityOct/Nov 2014Paper 1 Q141 Mark

Use of the Data Booklet is relevant to this question. Sir Humphrey Davy discovered boron, calcium, magnesium and sodium. Which of these elements has the second smallest atomic radius in its group and the third lowest first ionisation energy in its period?

Q: What is the correct answer to this A-Level Chemistry question?

The correct answer is C: magnesium.

Q: What topic does this question test?

This question tests Chemical periodicity in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Aboron

Bcalcium

Cmagnesium

Dsodium

✓ Correct Answer

The correct answer is C: 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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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Chemical periodicity in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Oct/Nov 2014 examination, Paper 1 Variant 2.

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