Physics A-Level
Fission
What Fission means in Physics A-Level, as defined for AQA.
Definition of Fission
Check what you remember
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Reference: AQA
A heavy nucleus absorbs a neutron and splits into two smaller nuclei, releasing two or three neutrons and energy.
Topics that use Fission
- Mass and energy (A-level only) (AQA A-Level)
Related terms
- Atomic mass unit
- Binding energy
- Binding energy per nucleon comparisons
- Breakdown of classical mechanics at relativistic speeds
- Energy release in nuclear reactions
- Energy released per kilogram of fuel
- Energy–mass equivalence
- Fusion and fission
Using Fission in the exam
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