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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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M
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Mendelevium
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1992-09-03
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A synthesized, radioactive metallic element
of the actinide series, symbol Md, atomic
number 101, atomic weight 258. It was first
produced by bombardment of Es-253 with helium
nuclei. Its longest-lived isotope, Md-258,
has a half-life of about two months. The
element is chemically similar to thulium. It
was named by the US physicists at the
University of California at Berkeley who
first synthesized it in 1955 for the Russian
chemist Mendeleyev, who in 1869 devised the
basis for the periodic table of the elements.