| Thulium | |
| Elemental State | Tm |
| Electron Configuration | 1s22s22p63s23p63d104s24p64d105s25p66s24f13 |
| First Ionization Potential | 6.184 eV |
| Electron Affinity | |
| Z* | |
| Pauling Electronegativity | 1.25 |
| Covalent Radius | |
| Metallic Radius | |
| Ionic Radius | |
| van der Waal's Radius | |
| Melting Point | 1545 oC |
| Boiling Point | 1950 oC |
| Density | 9.321 g/cm3 |
| Other Properties | |