What is nuclear fission ? Given an example to illustrate it.

Explanation

Nuclear fission : The process of dividing a heavy nucles into two or more smaller and stable nuclei due to nuclear reaction is called nuclear fission.
Ex : The fission reaction is `._(92)^(235)U + ._(0)^(1)n to._(56)^(141)Ba+ ._(36)^(92)Kr + 3 ._(0)^(1)n+Q`
Where Q is the energy released.
Q = (Total mass of reactants - Total mass of product) `C^(2)`
`= [("Mass of " ._(92)^(235)U + "Mass of" ._(0)^(1)n) - ("Mass of" ._(56)^(141)Ba + "Mass of" ._(36)^(92)Kr + "Mass of three neutrons")]C^(2)`
`= (235.043933 - 140.9177 - 91.895400 - 2xx1.008665) amu xx C^(2)`.
`= 0.2135xx931.5 MeV = 198.9 MeV = 200 MeV`