2013-03-13 13:01:02.0 [tbs1979] update Definition (U.S. Geological Survey); update Definition (An element with an unstable nucleus, which radiates alpha, beta or gamma radiation and gets converted to a stable element.);
2013-03-07 08:45:38.0 [tbs1979] Move Concepts delete broader relation (null); add broader relation (RADIOACTIVE ELEMENTS [334f47c1-fd13-483f-b493-e69a9e93d553,63027] - ELEMENTS [da22144c-634d-4007-aba9-e636a9f2fa3f,83143]);
2013-03-05 10:00:09.0 [tbs1979] Move Concepts add broader relation (RADIOACTIVE ELEMENTS [334f47c1-fd13-483f-b493-e69a9e93d553,63027] - ROCKS/MINERALS/CRYSTALS [ba8d7f68-ad3a-4874-bc75-312b24b1b1ac,61761]); delete broader relation (null);
ELEMENTS
RADIOACTIVE ELEMENTS
An element with an unstable nucleus, which radiates alpha, beta or gamma radiation and gets converted to a stable element.