A-LevelPhysicsNuclear physicsOct/Nov 2019Paper 1 Q381 Mark

The table gives some data relating to four neutral (uncharged) atoms W, X, Y and Z. [Table showing nucleon (mass) number and total number of particles (protons, neutrons and electrons) for atoms W, X, Y, Z.] Two of the atoms are isotopes of the same element. What is the proton number of this element?

Q: What topic does this question test?

This question tests Nuclear physics in A-Level Physics (syllabus code 9702). It is worth 1 mark.

D10

✓ Correct Answer

The correct answer is B: 8

📋 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 Physics Question

Topic

This multiple-choice question tests Nuclear physics in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2019 examination, Paper 1 Variant 2.

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