O-LevelPhysicsNuclear PhysicsOct/Nov 2024Paper 1 Q381 Mark
A radioactive isotope is injected into a patient as part of a medical test. The radiation emitted is detected outside the body. What are suitable properties for this isotope? [Table: radiation type, half-life]
ARow A: alpha particles, a few hours
BRow B: beta particles, a few years
CRow C: gamma rays, a few hours
DRow D: gamma rays, a few years
✓ Correct Answer
The correct answer is C: Row C: gamma rays, a few hours
📋 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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