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Physics (AS & A Level) · Feb / March 2016 · Paper 12 · Question 40

9702Atoms, nuclei and radiation

Thorium-234 ($^{234}_{90}$Th) decays by β⁻ emission into a daughter product which in turn decays by a further β⁻ emission into a granddaughter product. Which letter in the diagram represents the granddaughter product?

  1. AA
  2. BB
  3. CC
  4. DD

As printed in the paper

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Correct answer: B. B

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