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In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller, lighter nuclei. The fission process often produces free neutrons and gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay.


Fission is a type of nuclear reaction which may occur spontaneously or as a result of a particle striking an atomic nucleus. The reason fission occurs is that energy upsets the balance between the electrostatic repulsion between positively-charged protons and the strong nuclear force that holds protons and neutrons together.


Define nuclear fission. nuclear fission synonyms, nuclear fission pronunciation, nuclear fission translation, English dictionary definition of nuclear fission. n the splitting of an atomic nucleus into approximately equal parts, either spontaneously or as a result of the impact of a particle usually with an...


Fission occurs when an atom is split. The resulting pieces have less combined mass. The missing mass has been converted into nuclear energy.

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Nuclear fission definition is - a process in which the nucleus of a heavy atom is split apart.


What Is Nuclear Fission? Nuclear fission is the process in which a large nucleus splits into two smaller nuclei with the release of energy. In other words, fission the process in which a nucleus ...


Nuclear Fission. The sum of the masses of these fragments is less than the original mass. This 'missing' mass (about 0.1 percent of the original mass) has been converted into energy according to Einstein's equation. Fission can occur when a nucleus of a heavy atom captures a neutron, or it can happen spontaneously.


Nuclear fission: Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. Nuclear fission may take place spontaneously or may be induced by the excitation of the nucleus.


Nuclear fission definition, fission(def 2). See more.


Nuclear fission is a kind of nuclear reaction. It is when an atom splits apart into smaller atoms. Some fission reactions give off a lot of energy, and are used in nuclear weapons and nuclear reactors. Nuclear fission was discovered in December 1938 by the German nuclear chemist Otto Hahn and his assistant Fritz Strassmann in Berlin.