A chain reaction is a self-sustaining series of nuclear fission reactions in which the products of one reaction trigger subsequent reactions. It releases an enormous amount of energy and is used in nuclear power plants and atomic bombs.
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Neutron: A subatomic particle with no charge found within the nucleus of an atom. In nuclear reactions, neutrons are responsible for initiating and sustaining chain reactions.
Critical Mass: The minimum amount of fissile material required to sustain a self-sustaining chain reaction.
Radioactive Decay: The spontaneous breakdown or disintegration of atomic nuclei over time, resulting in the release of radiation.