Physics GCSE
unstable nuclei
What unstable nuclei means in Physics GCSE, as defined for AQA.
Definition of unstable nuclei
Check what you remember
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Reference: AQA
Some atomic nuclei are unstable and give out radiation as they change to become more stable.
Topics that use unstable nuclei
- Radioactive decay and nuclear radiation (AQA GCSE)
Related terms
- activity
- background radiation
- choosing a half-life
- gamma ray
- independence from conditions
- ionising power
- neutron emission
- penetration
Using unstable nuclei in the exam
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