Americium
Atomic Number: 95
Symbol: Am
Atomic Weight: 243.0614
Electron Configuration: [Rn] 5f7 7s2
Atomic Number: 95
Element Classification: Radioactive Rare Earth Element (Actinide Series)
Discovered By: G.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
Discovery Date: 1945 (United States)
Name Origin: named for the American continent, similar to the naming of the element europium.
Density (g/cc): 13.67
Melting Point (K): 1267
Boiling Point (K): 2880
Appearance: silvery-white, radioactive metal
Atomic Radius (pm): 173
Atomic Volume (cc/mol): 20.8
Ionic Radius: 92 (+4e) 107 (+3e)
Fusion Heat (kJ/mol): (10.0)
Evaporation Heat (kJ/mol): 238.5
Pauling Negativity Number: 1.3
Oxidation States: 6, 5, 4, 3
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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