Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

Which of the following statements about the random decay of the nuclei in a sample of uranium-238 is correct?

  • AThe probabilities of an alpha-particle, a beta-particle or a gamma ray being emitted from a nucleus in the sample are equal.
  • BThe probability of a nucleus in the sample decaying decreases as time passes.
  • CThe probability of a nucleus decaying in any ten minute interval is the same for all the nuclei in the sample.
  • DThe probability of a nucleus in the sample decaying increases as time passes.

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