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Physics · Oct / Nov 2021 · Paper 12 · Question 38

5054Half-life

A radioactive sample contains an isotope that emits alpha particles. Which quantity stays constant?

  1. Athe half-life of the isotope
  2. Bthe mass of the sample
  3. Cthe number of neutrons in the sample
  4. Dthe rate of decay of the isotope

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Correct answer: A. the half-life of the isotope

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