A-LevelPhysicsNuclear physics9702/12 · Oct/Nov 2011 · Q391 Mark

Which statement concerning α-particles is correct?

AAn α-particle has charge +4e.

BAn α-particle is a helium atom.

CWhen α-particles travel through air, they cause ionisation.

DWhen α-particles travel through a sheet of gold foil, they make the gold radioactive.

✓ Correct answer

C: When α-particles travel through air, they cause ionisation.

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2011 Paper 1 Variant 2, question 39.

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