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Mendelevium (Md), element 101, is a synthetic, radioactive metal in the actinide series [1]. It is man-made and not found naturally in the environment [1], [6]. Minute quantities are produced for research [6].
Mendelevium is a radioactive, man-made element [1]. It is a member of the actinide series, possessing the atomic number 101 [1], [6].
Scientific research
Mendelevium (element 101) was first synthesized by Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, and Glenn T. Seaborg at the University of California, Berkeley [25], [28].
Isotope 258Md was prepared by bombardment of 255Es with 4He ions [28].
There was controversy surrounding the naming of element 106, initially named seaborgium after Glenn T. Seaborg, and the controversy extended to other transuranic elements [20].
The International Union of Pure and Applied Chemistry (IUPAC) resolved naming disputes, also impacting elements 107-109 [30].
Mendelevium is a man-made radioactive element in the actinide family [1].
It has no stable isotopes, and the longest-lived isotope is 258Md with a half-life of 55 days [28].
Mendelevium's chemical behavior is similar to other trivalent actinides and lanthanides [5].
It can be reduced to a divalent ion stable in solution [5].
Mendelevium: divalency and other chemical properties
Mendelevium (element 101) is the first actinide element found to give a divalent ion stable in solution. The chemical behavior of Md(3+) is similar to that of the other trivalent actinides and lanthanides [5].
New Element Mendelevium, Atomic Number 101
Report on the first synthesis of Mendelevium [25].