SymbolU
Latin nameUranium
Atomic number92
Period7
Element categoryInner transition elements
Relative atomic mass238.0289
GroupVI.B
Electronegativity
1.7
Oxidation numbers
3, 1, 5, 6
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f3 6d1 7s2
Density [g/cm3]
19.03
State
Solid
Melting point [°C]
1132.3
Boiling point [°C]
3900
Thermal conductivity [W m-1K-1]
27.6
Heat capacity [J K-1g-1]
0.12
Discovery
1789
Hardness [Mohs scale]
6.0
Vickers hardness [MPa]
1960
Brinell hardness [MPa]
2400
Young's modulus [GPa]
208
Electrical conductivity [S m-1]
3.6 · 10-6
Shear modulus [GPa]
111
1.st ionization energy [eV]
6.1941
Stable isotopes
0
Unstable isotopes
15