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 |