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radioactive element |
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radioactive element, an element subject to spontaneous degeneration of its nucleus accompanied by the emission of alpha particles, beta particles, or gamma rays. All elements with atomic numbers greater than 83 are radioactive. Naturally occurring radioactive elements include radium, thorium, and uranium. Several radioactive elements not found in nature have been produced by the bombardment of stable elements with subatomic particles in a cyclotron. Compare stable element. See also radioactivity. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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radioactive radioactive carbon radioactive constant radioactive contamination radioactive contrast medium radioactive decay radioactive drug radioactive element radioactive half-life radioactive implant Radioactive Implants radioactive iodine radioactive iodine excretion radioactive iodine excretion test radioactive iodine uptake |
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