Cerium

Symbol | Ce
Latin name | Cerium
Atomic number | 58
Period | 6
Element category | Inner transition elements
Relative atomic mass | 140.115
Group | III.B
Electronegativity | 1.1
Oxidation numbers | 3, 4
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f1 5d1 6s2
Density [g/cm3] | 6.7
State | Solid
Melting point [°C] | 799
Boiling point [°C] | 3426
Covalent radius [pm] | 165
Thermal conductivity [W m-1K-1] | 11.4
Heat capacity [J K-1g-1] | 0.19
Discovery | 1803
Hardness [Mohs scale] | 2.5
Vickers hardness [MPa] | 270
Brinell hardness [MPa] | 412
Young's modulus [GPa] | 34
Electrical conductivity [S m-1] | 1.4 · 106
Shear modulus [GPa] | 14
1.st ionization energy [eV] | 5.5387
2.nd ionization energy [eV] | 10.851
3.rd ionization energy [eV] | 20.2
Stable isotopes | 4
Unstable isotopes | 15