A-LevelChemistryChemical periodicityMay/June 2019Paper 1 Q121 Mark

Element Q readily oxidises in air. The oxide produced reacts with water to form a solution of very low pH. Where could element Q be found in the Periodic Table? period group A 2 1 B 2 14 C 3 14 D 3 15

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

The correct answer is D: period: 3, group: 15.

Q: What topic does this question test?

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

Aperiod: 2, group: 1

Bperiod: 2, group: 14

Cperiod: 3, group: 14

Dperiod: 3, group: 15

✓ Correct Answer

The correct answer is D: period: 3, group: 15

📋 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 May/June 2019 examination, Paper 1 Variant 2.

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