Define release of the neutrons will set up a chain reaction

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Which statement is false concerning nuclear fission? 1) Absorption of a neutron by a U-235 nucleus will release at least one neutron. 2) If sufficient U-235 is present, the release of the neutrons will set up a chain reaction. 3) Reaction rates will be affected by pressure, temperature and catalysts just like chemical reactions 4) A large nuclei is broken down to smaller ones.

Reference no: EM13492346

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