Question
What is nuclear fission? Give one example and write its nuclear reaction.
✓
Answer
Nuclear fission is the process in which a heavy nucleus is splits into two light nuclei nearly of the same size by bombarding it with slow neutrons.
When uranium with Z = 92 is bombarded with neutron, it splits into two fragments namely barium (Z = 56) and krypton (Z = 36) and a large amount of energy is released which appears due to decrease in the mass
$\ce {^235_92 U + ^1_0n -> (^236_92U) -> ^144_56Ba + ^89_36Kr + 3^1_0n + Energy}$
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