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: If there is enough of an [[Unstable Isotope|unstable isotope]] in a [[material]] a single'''nuclear fission''' can trigger a[[Nuclear Chain Reaction|nuclear chain reaction]] in which the [[neutron]]s produced from the initial '''fission''' event can cause the '''fission''' of more than one other [[Unstable Isotope|unstable isotope]].
: A [[Nuclear Fission|nuclear fission]] [[Nuclear Chain Reaction|chain reaction]] is used in both [[Nuclear Bomb|nuclear bombs]] and [[Nuclear Fission Reactor|nuclear reactors]] in [[Nuclear Power|nuclear power stations]].