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element 115

   Also found in: Encyclopedia, Wikipedia 0.07 sec.
element 115
Symbol Uup
An artificially produced radioactive element whose isotopes have mass numbers of 287 and 288 and half-lives of less than one second. Atomic number 115. Also called ununpentium. See Periodic Table.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.element 115 - a radioactive transuranic element
atomic number 115, ununpentium, Uup
chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter


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? Mentioned in ? References in periodicals archive
 
Each of those putative atoms of element 115 disintegrated within fractions of a second by spontaneously ejecting an alpha particle, which contains two protons and two neutrons.
Two new elements made: atom smashups yield 113 and 115 by Weiss, P. / Science News
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