A-LevelPhysicsNuclear physicsMay/June 2022Paper 1 Q381 Mark
In an experiment on α-particle scattering, α-particles are directed at a thin gold foil. Most of the α-particles pass straight through the foil or are deflected by a small angle. A small number of α-particles are deflected by a large angle. Which statement cannot be deduced from this experiment?
AAtoms are mostly empty space.
BMost of the mass of an atom is concentrated in the nucleus.
CThe nucleus of an atom contains protons.
DThe nucleus of an atom is small compared to the size of an atom.
✓ Correct Answer
The correct answer is C: The nucleus of an atom contains protons.
📋 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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