Fermium
Symbol: Fm
Atomic Number: 100
Atomic Weight: 257.0951
Element Classification: Radioactive Rare Earth (Actinide)
Discovery: Argonne, Los Alamos, U. of California 1953 (United States)
Name Origin: Named in honor of the scientist Enrico Fermi.
Melting Point (K): 1800
Appearance: radioactive, synthetic metal
Atomic Radius (pm): 290
Pauling Negativity Number: 1.3
First Ionizing Energy (kJ/mol): (630)
Oxidation States: 3
Electronic Configuration: [Rn] 5f12 7s2
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)
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