92 U 238.03
Uranium
Actinide
Uranium (U) is a chemical element with atomic number 92, classified as a actinide. At room temperature it is a solid. It was discovered in 1789 by Martin Heinrich Klaproth.
Properties
- Atomic number
- 92
- Atomic mass
- 238.03 u
- Category
- Actinide
- Group
- 0
- Period
- 7
- Block
- f-block
- Electron configuration
- [Rn] 5f³ 6d¹ 7s²
- Phase at STP
- Solid
- Density
- 18.95 g/cm³
- Melting point
- 1405.3 K (1132.2 °C)
- Boiling point
- 4404 K (4130.9 °C)
- Electronegativity
- 1.38
- Atomic radius
- 240 pm
- Ionization energy
- 6.194 eV
- Discovery
- 1789 · Martin Heinrich Klaproth
Common uses
Nuclear power, weapons, dating rocks, glass coloring
Did you know?
Main fuel for nuclear power and naturally radioactive.