Nuclear energy
Nuclear Energy
Nuclear energy (pronunciation: /ˈnjuː.kli.ər ˈen.ər.dʒi/) is the energy in the nucleus, or core, of an atom. Atoms are tiny units that make up all matter in the universe, and energy is what holds these atoms together. Nuclear energy can be used to create electricity, but it must first be released from the atom.
Etymology
The term "nuclear" comes from the Latin nucleus, meaning "core". The word "energy" originates from the Greek energeia, which means "activity, operation". The term "nuclear energy" was first used in the 20th century, with the development of atomic power.
Related Terms
- Atom: The smallest unit of a chemical element that retains the properties of that element. The energy of an atom is found in its nucleus.
- Nuclear Fission: A nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
- Nuclear Fusion: A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
- Nuclear Reactor: A device used to initiate and control a sustained nuclear chain reaction, most commonly for the generation of electricity.
- Radioactive Decay: The process by which an unstable atomic nucleus loses energy by radiation.
- Radiation: The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
- Ionization: The process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes.
- Nuclear Power Plant: A thermal power station in which the heat source is a nuclear reactor.
See Also
External links
- Medical encyclopedia article on Nuclear energy
- Wikipedia's article - Nuclear energy
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