Lanthanum
Electron Configuration
|
General Properties
| Atomic Symbol | La |
| Atomic Weight | 138.9055 g/mol |
| Element Number | 57 |
| Standard State | Solid |
| Standard Type | Strongly Basic |
| Date of Discovery | 1839 |
| Discoverer | Mosander |
Physical Properties
| Oxidation States | 3 |
| Boiling Point | 3737 K |
| Melting Point | 1191 K |
| Density | 6.15 g/cm³ |
| Electron Configuration | [Xe]5d1,6s2 |
| Acid/Base Properties | Basic |
| Crystal Structure | Hexagonal |
| Electronegativity | 1.10 |
| Heat of Vaporization | 399.57 kJ/mol |
| Heat of Fusion | 11.3 kJ/mol |
| Electrical Conductivity | 1.9 10^6omg-¹cm-¹ |
| Thermal Conductivity | 13.5 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | 0.19 Jg-¹K-¹ (at 300 K) |
| First Ionization Potential | 5.58 |
| Atomic Volume | 22.5 cm³/mol |
| Atomic Radius | 1.38 Å |
| Covalent Radius | 1.25 Å |
| Synthetic | No |