Uup
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Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Uup
- The symbol for element 115.
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element 115
- An artificially produced radioactive element whose most stable confirmed isotopes have mass numbers of 287 and 288 and half-lives of less than one second. Also called ununpentium See Periodic Table.
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The American Heritage® Science Dictionary
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