element | Li | Na | K | Cs |
electronegativity | 0.98 | 0.93 | 0.82 | 0.79 |
Melting point | 180.54 | 97.720 | 63.380 | 28.440 |
Vaporisation point | 1342 | 882.9 | 758.9 | 671 |
Electronic affinity | 0.618 | 0.547 | 0.502 | 0.472 |
Ionisation energy | 5 eV | 5.139 | 4.341 | 3.894 |
Thermal conductivity | 85 W/mK | 140 | 100 | 36 |
Specific heat |
| 1230 J/Kg∙K | 757 | 242 |
Ref. structure | BCC |