Key term for AQA GCSE Physics, used in Hazards and Uses of Radiation.
The time it takes for the number of nuclei of a radioactive isotope in a sample to halve, or the time it takes for the activity or count-rate to fall to half its initial level.
Half-life appears in AQA GCSE Physics revision content for Atomic structure, especially Hazards and Uses of Radiation and Different half-lives of radioactive isotopes.
Atomic structure
Different half-lives of radioactive isotopes
Atomic structure
Half-lives and the random nature of radioactive decay
Atomic structure
Radioactive decay and nuclear radiation
Atomic structure
Uses of nuclear radiation
Atomic structure
Hazards and Uses of Radiation • Different half-lives of radioactive isotopes
Atomic structure
Nuclear Radiation • Half-lives and the random nature of radioactive decay
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