A-LevelPhysicsNuclear physics9702/12 · Oct/Nov 2014 · Q391 Mark

The isotope ²²²₈₆Rn decays in a sequence of emissions to form the isotope ²⁰⁶₈₂Pb. At each stage of the decay sequence, it emits either an α-particle or a β-particle. What is the number of stages in the decay sequence?

C16

D20

✓ Correct answer

B: 8

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2014 Paper 1 Variant 2, question 39.

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