100Fm

Fermium

Actinide

Fermium (Fm) is element 100, an actinide, in period 7 of the periodic table. Its atomic mass is usually given as 257, it melts at 1527 °C. Discovered by Lawrence Berkeley Lab, 1952.

Atomic Number100

SymbolFm

NameFermium

Atomic Weight257 u

CategoryActinide

Period7

Melting Point1527 °C

Electron Config[Rn] 5f12 7s2

Discovered ByLawrence Berkeley Lab, 1952

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