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mendelevium

(men′də lē′vē əm)

☆

noun

a radioactive, metallic chemical element, one of the actinides, produced by bombarding einsteinium with high-energy alpha particles in a cyclotron: symbol, Md; at. no., 101

Origin: ModL: so named in honor of Dmitri Ivanovich Mendeleev by its discoverers, A. Ghiorso, B. G. Harvey, G. R. Choppin, S. G. Thompson, & G. T. Seaborg, U.S. physicists

See mendelevium in American Heritage Dictionary 4

noun Symbol Md

A synthetic radioactive transuranic element of the actinide series that has known isotopes with mass numbers ranging from 245 to 262. The isotopes with the longest half-lives are Md 258 (51.5 days) and Md 260 (31.8 days). Atomic number 101; melting point 827°C; valence 2,3. See Table at element.

Origin:

Origin: After Dmitri Ivanovich Mendeleev

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