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element 113

noun, Chemistry, Physics.
1.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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element 113 in Science
element 113  
Symbol Uut
An artificially produced radioactive element whose isotopes have mass numbers of 283 and 284 and half-lives of slightly more than one second. Atomic number 113. Also called ununtrium. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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