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                                    How does nuclear fission take place? | 
                            
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Answer» Solution :(i)When a slow moving neutron is bombarded onUranium - 235 nucleus, it ABSORBS the neutron and gets converted into its isotope Uranium - 236. (ii)Uranium - 236 being extremely unstable, converts into atoms of Barium and KRYPTON through a process of fission releasing three neutrons and 200 Me V ENERGY.  
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