Fission

Breaking apart of a body into smaller fragments. In nuclear physics, fission refers to splitting of a heavy atomic nucleus into two or more lighter nuclei with an associated release of energy. The mass of the nucleus before fission is greater than the combined masses of the resulting fragments; the mass difference (Δm) is released as energy:

E = Dmc2


Some or all content above used with permission from J. H. Wittke.