Radioactivity
Similar term(s): radioactive.
Definition:
The spontaneous emission of ionizing radiation from the nucleus of an unstable atom. Radioisotopes lose particles and energy through this process.
Source: GreenFacts, based on Energy Information Administration
Glossary
More:
Radioactive refers to anything that is caused by, or exhibits radioctivity.
Radioactivity is measured in becquerel (Bq).
Source: GreenFacts
Related words:
Radiation - Radioactive decay - Radioactive material - Radioactive waste
To read about this term in context:
GreenFacts Summary on the Chernobyl Nuclear Accident:
Translation(s):
Español: Radiactividad
Français: Radioactivité
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