O-LevelPhysicsNuclear Physics5054/12 · May/June 2015 · Q381 Mark

A nucleus of ²¹⁵₈₄Po decays by emitting an alpha-particle and the resulting nucleus then decays by emitting a beta-particle. What is the nucleon number and proton number of the final nucleus?

Anucleon number 211, proton number 81

Bnucleon number 211, proton number 83

Cnucleon number 212, proton number 81

Dnucleon number 212, proton number 83

✓ Correct answer

B: nucleon number 211, proton number 83

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Topic: Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2015 Paper 1 Variant 2, question 38.

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