Gadolinium

Symbol | Gd
Latin name | Gadolinium
Atomic number | 64
Period | 6
Element category | Inner transition elements
Relative atomic mass | 157.25
Group | III.B
Electronegativity | 1.1
Oxidation numbers | 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f7 5d1 6s2
Density [g/cm3] | 7.9
State | Solid
Melting point [°C] | 1311
Boiling point [°C] | 3266
Atomic radius [pm] | 233
Covalent radius [pm] | 196
Thermal conductivity [W m-1K-1] | 10.6
Heat capacity [J K-1g-1] | 0.236
Discovery | 1880
Vickers hardness [MPa] | 570
Brinell hardness [MPa] | 180
Young's modulus [GPa] | 55
Electrical conductivity [S m-1] | 7.7 · 105
Shear modulus [GPa] | 22
1.st ionization energy [eV] | 6.15
2.nd ionization energy [eV] | 12.095
3.rd ionization energy [eV] | 20.635
Stable isotopes | 7
Unstable isotopes | 11