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.
Experiment with the elements
Plutonium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.