A-LevelPhysicsNuclear physics9702/12 · May/June 2019 · Q381 Mark

A nucleus of francium-221 (²²¹₈₇Fr) decays into a nucleus of bismuth-209 (²⁰⁹₈₃Bi) in several steps. Which particles could be emitted?

A2 α-particles and 4 β⁻ particles

B2 α-particles and 4 β⁺ particles

C3 α-particles and 2 β⁻ particles

D3 α-particles and 2 β⁺ particles

✓ Correct answer

C: 3 α-particles and 2 β⁻ particles

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2019 Paper 1 Variant 2, question 38.

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