A-LevelPhysicsNuclear physics9702/12 · May/June 2015 · Q391 Mark

A radioactive substance contains a number of identical nuclei that emit β-particles. Which property of these nuclei remains unaltered by the emission?

Acharge

Bneutron number

Cnucleon number

Dproton number

✓ Correct answer

C: nucleon number

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2015 Paper 1 Variant 2, question 39.

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