less than 1 minute read


Fission, nuclear reaction in which the atom is split into 2 approximately equal masses. Fission is accompanied by the emission of extremely high quantities of energy, since the sum of the masses of the 2 new atoms is less than the mass of the parent heavy atom. The energy released is expressed by Einstein's equation E=mc2.

See also: Atom; Nuclear energy; Uranium.

Additional topics

21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Federalist, The to Forensic science