Thulium
Electron Configuration
|
General Properties
| Atomic Symbol | Tm |
| Atomic Weight | 167.26 g/mol |
| Element Number | 69 |
| Standard State | Solid |
| Standard Type | Strongly Basic |
| Date of Discovery | 1879 |
| Discoverer | Cleve |
Physical Properties
| Oxidation States | 3, 2 |
| Boiling Point | 2223 K |
| Melting Point | 1818 K |
| Density | 9.32 g/cm³ |
| Electron Configuration | [Xe]4f13,6s2 |
| Acid/Base Properties | Basic |
| Crystal Structure | Hexagonal |
| Electronegativity | 1.25 |
| Heat of Vaporization | 191* kJ/mol |
| Heat of Fusion | 16.8* kJ/mol |
| Electrical Conductivity | 1.3 10^6omg-¹cm-¹ |
| Thermal Conductivity | 16.8 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | 0.16 Jg-¹K-¹ (at 300 K) |
| First Ionization Potential | 6.184 |
| Atomic Volume | 18.1 cm³/mol |
| Atomic Radius | 1.77 Å |
| Covalent Radius | 1.56 Å |
| Synthetic | No |