| Ho | Holmium | Rare Earth |
| Atomic number: | 67 | Atomic weight: | 164.93032 | ||
| Shells: | 2,8,18,29,8,2 | Orbitals: | [Xe] 4f11 6s2 | ||
| Melting point: | 1474°C | Boiling point: | 2700°C | ||
| Covalent radius: | 1.58 | Å | Atomic volume: | 18.7 | cm³/mol |
| Atomic radius: | 2.47 | Å | Ionic radius: | -- | Å |
| Electronegativity: | 1.23 | Oxidation states: | |||
| 1st ionization pot.: | 6.0216 | V | 2nd ionization pot.: | 11.805 | V |
| 3rd ionization pot.: | 22.843 | V | Specific heat: | 0.16 | J/gK |
| Heat of fusion: | 12.20 | kJ/mol | Heat of vapor.: | 241.0 | kJ/mol |
| Thermal conduct.: | 0.162 | W/cmK | Electrical conduct.: | 0.0124 | 10^6/cm ohm |
| Density: | 8.80 | g/cm³ | Valence: | 3 |