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meitnerium
(redirected from Element 109)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson 0.07 sec.
meit·ner·i·um (mt-nûr-m)
n. Symbol Mt
A radioactive synthetic element whose longest-lived isotopes have mass numbers of 266 and 268 with half-lives of 3.4 milliseconds and 70 milliseconds. Atomic number 109.


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? Mentioned in ? References in periodicals archive
 
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 by Lipkin, Richard / Science News
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 by Thomsen, Dietrick E. / Science News
Confirmed discoveries of transuranic elements now go as far as element 109.
On the trail of element 110 by Science News
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