Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

What does the term half-life of a radioactive isotope mean?

  • Ahalf of the time taken for all of the original nuclei to decay
  • Bthe time taken for half of the original nuclei to decay
  • Cthe time taken for the charges on all the nuclei to halve
  • Dthe time taken for the mass of each nucleus to halve

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