ocr: NUCLEAR FISSION NEUTRON NUCLEUS NEUTRON. ENERGY EXPELLED NEUTRON. Nuclear fission occurs when a neutron strikes the nucleus ofa uranium atom. The nucleus splits into fragments, releasing a large amount ofe energy. Among the tragments are more neutrons which, in turn, cause more uranium nuclei to split. A chain reaction starts that generates enormous heat.
(.png)
(Dorling Kindersley).iso/article2/powe/powe4x.dib/powe4x.png)