← Back to periodic table
Uranium (U)
Atomic number: 92 · Category: actinide · Group 3 · Period 7 · Phase: Solid
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.
Block: f
Molar heat: 27.665
CPK color:#008fff
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f3 6d1
Configuration (semantic): [Rn] 5f3 6d1 7s2
Shells: 2, 8, 18, 32, 21, 9, 2
Electronegativity (Pauling): 1.38
Electron affinity: 50.94
Ionization energies: 597.6, 1420
Periodic position
Group: 3
Period: 7
xpos: 6
ypos: 10
Spectral/Bohr images
Image
3D Model