94 Pu 244
Plutonium
Actinide
Plutonium (Pu) is a chemical element with atomic number 94, classified as a actinide. At room temperature it is a solid. It was discovered in 1940 by Glenn T. Seaborg et al..
Properties
- Atomic number
- 94
- Atomic mass
- 244 u
- Category
- Actinide
- Group
- 0
- Period
- 7
- Block
- f-block
- Electron configuration
- [Rn] 5f⁶ 7s²
- Phase at STP
- Solid
- Density
- 19.84 g/cm³
- Melting point
- 912.5 K (639.4 °C)
- Boiling point
- 3501 K (3227.8 °C)
- Electronegativity
- 1.28
- Atomic radius
- 243 pm
- Ionization energy
- 6.026 eV
- Discovery
- 1940 · Glenn T. Seaborg et al.
Common uses
Nuclear weapons, space missions, nuclear reactors
Did you know?
Powers space missions to outer planets and extremely toxic.