Apply: nuclear fission

A uranium-$235$‍ nucleus undergoes nuclear fission. It produces two fission products and a certain number of free neutrons.

${\phantom{A}}_{\phantom{92}}^{\phantom{235}}{\phantom{A}}_{\phantom{2}92}^{\phantom{2}235}\mathrm{U}+{\phantom{A}}_{\phantom{0}}^{\phantom{1}}{\phantom{A}}_{\phantom{2}0}^{\phantom{2}1}\mathrm{n}\to {\phantom{A}}_{\phantom{38}}^{\phantom{94}}{\phantom{A}}_{\phantom{2}38}^{\phantom{2}94}\mathrm{Sr}+{\phantom{A}}_{\phantom{54}}^{\phantom{140}}{\phantom{A}}_{\phantom{2}54}^{\phantom{2}140}\mathrm{Xe}+$‍ ${\phantom{A}}_{\phantom{0}}^{\phantom{1}}{\phantom{A}}_{\phantom{2}0}^{\phantom{2}1}\mathrm{n}$‍