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Dictionary

ra'dioac'tive se'ries

Physics, Chem.
a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced. Also called decay series.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

radioactive decay

radioactive waste

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