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Americium

Am Americium
95
243.0614
10
Symbol
Am
Atomic Number
95
Atomic Weight
243.0614
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, by analogy with 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
Covalent Radius (pm)
n/a
Ionic Radius
92 (+4e) 107 (+3e)
Specific Heat
n/a
Fusion Heat (kJ/mol)
(10.0)
Evaporation Heat (kJ/mol)
238.5
Thermal Conductivity (@25°C W/m K)
n/a
Debye Temperature (K)
n/a
Pauling Negativity Number
1.3
First Ionizing Energy (kJ/mol)
n/a
Oxidation States
6, 5, 4, 3
Electronic Configuration
[Rn] 5f7 7s2
Lattice Structure
(n/a)
Lattice Constant
n/a
Lattice C/A Ratio
n/a

KEY

SEE ALSO

Americium

Columbia Encyclopedia

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