Key term for Edexcel GCSE Physics, used in Medical Uses.
The time taken for half of the undecayed nuclei in a radioactive sample to decay, or the time taken for the activity of a source to halve.
Half-life appears in Edexcel GCSE Physics revision content for Radioactivity, especially Medical Uses and Isotope Production for PET.
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Radioactivity
Medical Uses • Tumour Treatment
