Skip to content
    Physics GCSE

    number of half-lives

    What number of half-lives means in Physics GCSE, as defined for AQA.

    Definition of number of half-lives

    Check what you remember

    Read the wording for your board, then hide it and explain number of half-lives in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

    Reference: AQA

    Found by halving repeatedly or by writing the fall as a power of two.
    AQA · Half-lives and the random nature of radioactive decay (study guide)

    Topics that use number of half-lives

    Related terms

    Using number of half-lives in the exam

    Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

    Practise Physics questions

    Create a free account to answer exam-style questions on this topic and get feedback on your answers.

    Start free

    A week of Premium from your first lesson · Then the free plan continues · No card, no charge

    All Physics GCSE terms