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  1. GCSE
  3. Physics AQA
  5. 4.2.3 Half-lives and the random nature of radioactive decay

4.2.3 Half-lives and the random nature of radioactive decay

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Revise AQA GCSE Physics 4.2.3 Half-lives and the random nature of radioactive decay with the question bank, lessons, revision guides, and flashcards.

Radioactive decay is random. • The half-life of a radioactive isotope is the time it takes for the number of nuclei of the isotope in a sample to halve, or the time it takes for the count rate (or activity) from a sample containing the isotope to fall to half its initial level.

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