| Chlorine | |
| Elemental State | Cl2 |
| Electron Configuration | 1s22s22p63s23p5 |
| First Ionization Potential | 12.968 eV |
| Electron Affinity | 3.613 eV |
| Z* | 6.116 (Clementi-Raimondi) |
| Pauling Electronegativity | 3.16 |
| Covalent Radius | 0.99 Å |
| Metallic Radius | |
| Ionic Radius | 1.67 Å Cl– coordination number = 6 |
| van der Waal's Radius | 1.75 Å |
| Melting Point | –101.5 oC |
| Boiling Point | –34.04 oC |
| Density | 3.214 g/L |
| Other Properties | |