Symbol
Am
Atomic Number
95
Atomic Mass
243
Protons
95
Neutrons
148
Electrons
95
Type
Actinide
Isotopes
Americium-241
Discovery Year
1944
Discovered By
Glenn T. Seaborg, Albert Ghiorso, and Emilio Segrè
Group
3
Period
7
Boiling Point
2646°F
Melting Point
1176°F
Electron Configuration
[Rn] 7s² 5f⁷
Density (g/cm³)
13.69
Crystal Structure
Cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid