Physics GCSE
activity and half-life
What activity and half-life means in Physics GCSE, as defined for AQA.
Definition of activity and half-life
Check what you remember
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Reference: AQA
A short half-life means each nucleus is very likely to decay soon, so for the same number of nuclei the activity is high.
Topics that use activity and half-life
- Different half-lives of radioactive isotopes (AQA GCSE)
Related terms
- activity against duration
- hazard over time
- medical tracers
- unit conversion
- waste storage
- range of half-lives
- steepness of decay curve
Using activity and half-life in the exam
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