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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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