Atomic Properties
- Atomic Number
- 92
- Atomic Mass
- 238.0300 u
- Electron Configuration
- [Rn] 5f3 6d1 7s2
- Electronegativity
- 1.38
- Block
- f-block
- Group
- —
- Period
- 7
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1405.30 K
- Boiling Point
- 4404.00 K
- Density
- 19.1000 g/cm³
About Uranium
Fuel for nuclear reactors and weapons; named after planet Uranus.
Isotopes of Uranium
Uranium has 3 naturally occurring isotopes, plus 2 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 233U | 233 | 233.0396355 | — | Radioactive |
| 234U | 234 | 234.0409523 | 5.40e-3% | Stable |
| 235U | 235 | 235.0439301 | 0.7204% | Stable |
| 236U | 236 | 236.0455682 | — | Radioactive |
| 238U | 238 | 238.0507884 | 99.27% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)