Becquerel
Becquerel (Bq)
Becquerel (pronounced: bec-uh-rel, /ˈbɛkərɛl/) is a unit of radioactivity in the International System of Units (SI). It is named after the French physicist Henri Becquerel, who discovered radioactivity.
Etymology
The term "Becquerel" is derived from the name of the French physicist Henri Becquerel. In 1896, Becquerel discovered the phenomenon of natural radioactivity, which led to the development of the field of nuclear physics. The unit was established by the International Committee for Weights and Measures in 1975.
Definition
One Becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. It is therefore a measure of the rate at which a substance undergoes radioactive decay.
Related Terms
- Radioactivity: The phenomenon of emission of radiation as a result of nuclear decay.
- Decay: The process by which an unstable atomic nucleus loses energy by radiation.
- Nucleus: The central part of an atom, containing protons and neutrons.
- Proton: A subatomic particle with a positive electric charge.
- Neutron: A subatomic particle with no electric charge.
- International System of Units (SI): The modern form of the metric system, and the most widely used system of measurement.
See Also
External links
- Medical encyclopedia article on Becquerel
- Wikipedia's article - Becquerel
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