95 Am
Actinide
Americium
Used in smoke detectors.
Properties of Americium
- Atomic number (Z)
- 95
- Symbol
- Am
- Atomic mass
- 243 g/mol
- Category
- Actinide
- Group
- 3
- Period
- 7
- Electron configuration
- [Rn] 5f⁷ 7s²
- Electronegativity (Pauling)
- 1.13
- Atomic radius
- 175 pm
- First ionization energy
- 578 kJ/mol
- Melting point
- 1449 K (1175.8 °C)
- Boiling point
- 2880 K (2606.8 °C)
- Density
- 13.69 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1944