Sodium vs Chlorine
| Property | Na Sodium | Cl Chlorine |
|---|---|---|
| Atomic number | 11 | 17 |
| Symbol | Na | Cl |
| Name | Sodium | Chlorine |
| Category | alkali-metal | halogen |
| Standard Atomic Weight | 22.989769 u | 35.4515 u |
| Period | 3 | 3 |
| Group | 1 | 17 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [Ne]3s1 | [Ne]3s23p5 |
| Oxidation states | [-1, 0, 1] | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 0.93 | 3.16 |
| Electron affinity | 0.5479 eV | 3.6127 eV |
| Density | 970 kg/m³ | 3.214 kg/m³ |
| Melting point | 97.8 °C | -101.5 °C |
| Boiling point | 882.85 °C | -34.04 °C |
| Discovery year | 1807 | 1774 |