Atomic Properties
- Atomic Number
- 94
- Atomic Mass
- 244.0000 u
- Electron Configuration
- [Rn] 5f6 7s2
- Electronegativity
- 1.28
- Block
- f-block
- Group
- —
- Period
- 7
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 912.50 K
- Boiling Point
- 3505.00 K
- Density
- 19.8500 g/cm³
About Plutonium
Used in nuclear weapons and reactors; named after dwarf planet Pluto.
Isotopes of Plutonium
Plutonium has 0 naturally occurring isotopes, plus 6 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 238Pu | 238 | 238.0495601 | — | Radioactive |
| 239Pu | 239 | 239.0521636 | — | Radioactive |
| 240Pu | 240 | 240.0538138 | — | Radioactive |
| 241Pu | 241 | 241.0568517 | — | Radioactive |
| 242Pu | 242 | 242.0587428 | — | Radioactive |
| 244Pu | 244 | 244.0642053 | — | Radioactive |
Data source: NIH PubChem (aggregated from IUPAC, NIST)