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Nuclear Fission Beginning of Paper The word ‘nuclear’ refers to the center or nucleus of an atom. is the chief method of producing nuclear energy. It involves using a neutron to split the nucleus of a heavy element, such as uranium, into fission fragments. Besides heat energy, fission releases neutrons and such r .... Middle of Paper .... repeated over, it becomes a self-sustaining chain reaction. This energy producing process is called a chain reaction. uses the uranium-235 element because it is the easiest of all atoms to split apart. Uranium-235 is made up of many protons and few neutrons. Protons naturally repel one another so a nucleus made up of many protons tends to ‘fly apart’ more easily. In addition, uranium makes a good nuclear reactor because it can sustain a series of fission reactions, each time producing more neutrons in chain reaction. Therefore, urani .... 553 words | 3 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95