Nuclear fission refers to the nuclear reaction in which the nucleus of an atom breaks up into lighter nuclei.
Atoms split apart during nuclear fission, which releases energy. Nuclear fission is used by all nuclear power plants, and uranium atoms are often used in nuclear power plants. A neutron divides an atom of uranium when it collides with it during nuclear fission, releasing a significant quantity of energy in the form of heat and radiation.
A nucleus splits into two roughly equal pieces during nuclear fission, releasing two or three neutrons in the process. It typically happens when a neutron strikes a plutonium 239 or uranium 235 nuclei.
Thus, Nuclear fission is the splitting of an atomic nucleus, according to definition.
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