Nuclear fission is a reaction in which the nucleus of atom when bombarded with a sub-atomic particle splits into smaller nuclei along with the release of by-product particles and large amounts of heat
The given scenario describes a nuclear fission reaction. If we consider the U-235 being bombarded by neutron then we have:
₉₂U²³⁵ + ₀n¹ → ₅₆Ba¹⁴⁴ + ₃₆Kr⁸⁹ + 3₀n¹ + heat
