Nuclear fission is the process in which a heavy atomic nucleus splits into two or more lighter nuclei when struck by a slow-moving neutron, releasing a large amount of energy.
- Occurs in heavy nuclei like uranium-235
- Releases neutrons and energy
- Used in nuclear reactors
Nuclear Fusion
Nuclear fusion is the process in which two or more light atomic nuclei combine to form a heavier nucleus, releasing a very large amount of energy.
- Occurs at very high temperature and pressure
- Takes place in the sun and stars
- Produces more energy than fission
Key Point:
Nuclear fission splits heavy nuclei, while nuclear fusion joins light nuclei to release energy.
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