noun
a process in which the nucleus of an atom splits into two or more smaller nuclei, releasing a large amount of energy
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Nuclear fission is the process in which the nucleus of an atom splits into two or more smaller nuclei.
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Did you know that nuclear fission is used in nuclear power plants to generate electricity?
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Some people think nuclear fission is like splitting atoms to create a big boom.
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In a way, nuclear fission can be compared to breaking apart a puzzle to reveal its pieces.