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Difference between Nuclear Fission and Nuclear Fusion

Learn the difference between nuclear fission and nuclear fusion. Nuclear fission is the splitting of a large atom like uranium 235 which is used often for nuclear fission. A neutron strikes uranium 235 which then becomes a very unstable uranium 236 which quickly splits into lighter elements and gives off additional neutrons, gamma rays, and energy. These new neutrons then strike other uranium 235 atoms which repeat this process and this can set of a chain reaction. Nuclear fusion is the combining or fusing of two or more lighter elements into a larger one. For example two isotopes of hydrogen, deuterium and tritium can fuse and produce helium and give off one neutron plus lots of energy. It takes considerable energy to force nuclei to fuse, even those of the lightest element It is estimated that on Earth a temperature of 100 million degrees celsius would need to fuse hydrogen into helium.