Americium

Symbol

Am

Atomic number

95

Atomic mass	243		Thermal conductivity	0.1
Atomic radius	...		Covalent radius	...
Density	13.6		Atomic volume	18.28
Melting point	1268		Oxidation states	6,5,4,3
Boiling point	2880		Stable isotopes	0
Heat of vapor.	...		Electronegativity	1.3
Heat of fusion	14.4		First ionization	5.993
Specific heat	0.11		Electrical conduct.	...

Electron configuration

Americium

Americium, a trans-uranic element, was first discovered by Glenn Seaborg and collaborators at the University of California, Berkeley.

The isotope americium-241 was made by bombarding uranium-238 with alpha particles (helium nuclei). This produced plutonium-241 which decays to the Am-241. This isotope decays slowly by alpha emission with a halflife of 500 years. It has been used as a source in smoke detectors.

Americium Nuclear Data