A-LevelPhysicsNuclear physics9702/12 · May/June 2013 · Q401 Mark

An actinium nucleus has a nucleon number of 227 and a proton number of 89. It decays to form a radium nucleus, emitting a beta particle and an alpha particle in the process. What are the nucleon number and the proton number of this radium nucleus?

A223 87

B223 88

C224 87

D225 86

✓ Correct answer

B: 223 88

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2013 Paper 1 Variant 2, question 40.

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