Nuclear Fission and Fusion. Nuclear power. Power can be obtained two ways. Fission Splitting atoms Get energy if the nucleus is big. The smaller ones are more stable. What we do in nuclear reactors. Fusion Joining atoms Get energy if the nuclei are small.
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Fission is the splitting of atoms
These are usually very large, so that they are not as stable
Fission chain has three general steps:
1. Initiation. Reaction of a single atom starts the chain (e.g., 235U + neutron)
2. Propagation. 236U fission releases neutrons that initiate other fissions
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H-bombs 1000s of times more powerful than A-bombs
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