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 |