element 109

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Noun1.element 109 - a radioactive transuranic element
atomic number 109, meitnerium, Mt
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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References in periodicals archive
While a few of these scientists later claimed Nobel prizes or appeared on postage stamps, one gained what may be the ultimate chemical accolade: Austrian physicist Lise Meitner had element 109, meitnerium, named in her honor.
A Tale of Seven Elements
During decay, one of the atoms gave rise to a daughter element 109, with an atomic mass of 268, and a granddaughter element 107, with a mass of 264.
Physicists spot element 111
GSI, which has an unconfirmed claim to element 109, is now trying to confirm the apparent discovery of element 110.
Discovering transuranic elements at Dubna
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