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What happens in a fission reaction? A.) Atom combines with another nuclei B.) Atom splits into two or more smaller nuclei, as well as free neutrons C.) Atom explodes and every single neutron and proton separates outwards from each other, releasing energy D.) A nuclear warhead is denotated, and the explosion is controlled and converted to energy
B.) Atom splits into two or more smaller nuclei, as well as free neutrons. This causes a chain reaction as the free neutron hits other big molecules, which causes them to separate.