92Solid
U 238.029 Atomic mass · uActinides
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.
Discovery 1789 (Martin Heinrich Klaproth)
K2L8M18N32O21P9Q2
Physical properties
Values for the element in its standard state.
- Density
- 19.05g/cm³
- Melting point
- 1,408K
- Boiling point
- 4,200K
- Atomic radius
- Not available
- Bonding type
- Metallic
- Molar heat
- 27.665J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 10 electrons; 6s, 2 electrons; 6p, 6 electrons; 5f, 3 electrons; 6d, 1 electrons; 7s, 2 electrons;
[Rn] represents 86 core electrons. The full view shows them explicitly.
92 electrons Orbital order preserved from source
- Electronegativity
- 1.38Pauling scale
- First ionization energy
- 598kJ/mol
- Electron affinity
- Not available
- Van der Waals radius
- 186pm
U UraniumAtomic number 92
598kJ/mol
Atomic numberGaps indicate unavailable data
About uranium
- Appearance
- Not recorded
- Discovery
- 1789 (Martin Heinrich Klaproth)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.