Europium

Symbol | Eu
Latin name | Europium
Atomic number | 63
Period | 6
Element category | Inner transition elements
Relative atomic mass | 151.965
Group | III.B
Electronegativity | 1.0
Oxidation numbers | 2, 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f7 5d0 6s2
Density [g/cm3] | 5.243
State | Solid
Melting point [°C] | 822
Boiling point [°C] | 1597
Atomic radius [pm] | 231
Thermal conductivity [W m-1K-1] | 13.9
Heat capacity [J K-1g-1] | 0.182
Discovery | 1896
Vickers hardness [MPa] | 167
Young's modulus [GPa] | 18
Electrical conductivity [S m-1] | 1.1 · 106
Shear modulus [GPa] | 7.9
1.st ionization energy [eV] | 5.6704
2.nd ionization energy [eV] | 11.245
3.rd ionization energy [eV] | 24.926
Stable isotopes | 2
Unstable isotopes | 19