Holmium

Symbol | Ho
Latin name | Holmium
Atomic number | 67
Period | 6
Element category | Inner transition elements
Relative atomic mass | 164.93032
Group | III.B
Electronegativity | 1.2
Oxidation numbers | 3
Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f11 5d0 6s2
Density [g/cm3] | 8.8
State | Solid
Melting point [°C] | 1474
Boiling point [°C] | 2695
Atomic radius [pm] | 175
Covalent radius [pm] | 192
Thermal conductivity [W m-1K-1] | 16.2
Heat capacity [J K-1g-1] | 0.165
Discovery | 1879
Vickers hardness [MPa] | 481
Brinell hardness [MPa] | 746
Young's modulus [GPa] | 65
Electrical conductivity [S m-1] | 1.1 · 106
Shear modulus [GPa] | 26
1.st ionization energy [eV] | 6.0216
2.nd ionization energy [eV] | 11.805
3.rd ionization energy [eV] | 22.843
Stable isotopes | 1
Unstable isotopes | 28