Transcription: Nuclear fission is the process in which atoms of certain elements split, producing heat. A commonly used element is uranium-235. The nucleus of the uranium-235 atom contains 235 particles called protons and neutrons. In naturally occurring samples of uranium, where the concentration of nuclei is low, free neutrons move about passing through or colliding with the nuclei without effect. Occasionally, a neutron causes a nucleus to split, or fission, into two parts. This event releases energy and produces two or three new free neutrons. However, the free neutrons are quickly lost, so no sustained ...
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