element 111 Hear it!

element 111 definition

element 111

a radioactive chemical element with a very short half-life: a transactinide produced by bombarding bismuth with nickel atoms: at. no., 111; unununium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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