94 Pu
Actinide
Plutonium
Used in nuclear weapons.
Properties of Plutonium
- Atomic number (Z)
- 94
- Symbol
- Pu
- Atomic mass
- 244 g/mol
- Category
- Actinide
- Group
- 3
- Period
- 7
- Electron configuration
- [Rn] 5f⁶ 7s²
- Electronegativity (Pauling)
- 1.28
- Atomic radius
- 175 pm
- First ionization energy
- 585 kJ/mol
- Melting point
- 912.5 K (639.4 °C)
- Boiling point
- 3505 K (3231.8 °C)
- Density
- 19.84 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1940