7.11 understand the term ‘half-life’ and understand that it is different for different radioactive isotopes
A half-life is the time it takes for the radiation emitted by a source to decrease by half.
Half-lives are different for different sources of radiation.
A half life is the AVERAGE time taken for half of the unstable nuclei to decay it is vital to include average as if you measured the half life of the same substance repeatedly t won't take the same amount of time
A half life is the AVERAGE time taken for half of the unstable nuclei to decay it is vital to include average as if you measured the half life of the same substance repeatedly t won't take the same amount of time
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