92UUranium238.028913[Rn] 5f³ 6d¹ 7s²
actinide
Uranium
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
Electrons by shell
Electron configuration
5f3
6d1
7s2
86 is the [Rn] core total across six shells.
At a glance
- Atomic number
- 92
- Atomic mass
- 238.028913 u
- Phase
- Solid
- Density
- 19.1 g/cm³
- Melting point
- 1,405.3 K
- Boiling point
- 4,404 K
- First ionization energy
- 597.6 kJ/mol
- Electronegativity
- 1.38
- Electron affinity
- 50.94 kJ/mol
- Molar heat capacity
- 27.665 J/(mol·K)
- Period
- 7
- Appearance
- Unavailable
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.