Americium

12
243
[Rn] 5f77s2
241Am, 243Am
7
f
95
2, 8, 18, 32, 25, 8, 2
576.384
Am
12
1176°C, 2149°F, 1449 K
2011°C, 3652°F, 2284 K
Glenn Seaborg and colleagues
1944
7440-35-9
22405
More Information
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Atomic Data

Atomic Radiues, Non-bonded (A): 2.44
Electron Affinity (kJ mol-1): Unknown
Covalent Radiues (A): 1.73
Electronegativity (Pauling Scale): Unknown
Ionisation Energies (kJ mol-1) 1st 2nd 3rd 4th 5th 6th 7th 8th
576.384 - - - - - - -

Oxidation States and Isotopes

Common oxidation states 1
Isotope Atomic Mass Natural Abundance Half Life Mode of Decay
241Am 241.057 - 432.7 y α
1.2 x 1014 y sf
243Am 243.061 - 7.37 x 103 y α
2 x 1014 y sf

Pressure and Temperature Data

Specific Heat Capacity: Unknown
Shear Modulus: Unknown
Young Modulus: Unknown
Bulk Modulus: Unknown
Pressure 400k Pressure 600k Pressure 800k Pressure 1000k Pressure 1200k Pressure 1400k Pressure 1600k Pressure 1800k Pressure 2000k Pressure 2200k Pressure 2400k
- - 3.88 x 10-7 0.00167 0.423 21.35 - - - - Unknown