radioactinium


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radioactinium

[¦rād·ē·ō·ak′tin·ē·əm]
(nuclear physics)
Conventional name for the isotope of thorium which has mass number 227 and is in the actinium series. Symbolized RdAc.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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