101Md

Mendelevium

Actinide

Mendelevium (Md) is element 101, an actinide, in period 7 of the periodic table. Its atomic mass is usually given as 258, it melts at 827 °C. Discovered by Lawrence Berkeley Lab, 1955.

Atomic Number101

SymbolMd

NameMendelevium

Atomic Weight258 u

CategoryActinide

Period7

Melting Point827 °C

Electron Config[Rn] 5f13 7s2

Discovered ByLawrence Berkeley Lab, 1955

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