Related Terms. Ratio of the density of a substance at 20Â°C or 68Â°F to the density of water at 4Â°C or 39.2Â°F.
Flare ... Fission. In nuclear physics, the splitting of the atomic nucleus of a heavy element, resulting in the emission of nuclear energy and possibly causing a chain reaction (with similar results) within a mass of the element.Fission, Nuclear ... is a splitting of something into two parts. ~ may refer to:*In physics, nuclear ~ is a process where a large atomic nucleus is split into two smaller particles.... and other physical processes. In popular culture ...
Nuclear fission, the fission or splitting of an atomic nucleus, can happen in two basic ways. One is a form of natural radioactive decay called spontaneous fission. The atomâ¦ just splits apart. The other involves the absorption of a neutron, and fission can occur as a result of this as well.