See also:Radiation Wikipedia does not have an article with this exact name. ... Wiktionary full URL is a sister project to Wikipedia intended to be a free wiki dictionary (including thesaurus and lexicon) in every language. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). ... The radiation warning symbol (trefoil). ... Radio-Activity is a 1975 album by Kraftwerk. ... Radiation has a variety of different meanings. ...
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Natural radioactivity is exhibited by several elements, including radium, uranium, and other members of the actinide series, and by some isotopes of lighter elements, such as carbon-14, used in radioactive dating.
Radioactivity may also be induced, or created artificially, by bombarding the nuclei of normally stable elements in a particle accelerator.
The rate of disintegration of a radioactive substance is commonly designated by its half-life, which is the time required for one half of a given quantity of the substance to decay.
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