Chlorine vs Copper
| Property | Cl Chlorine | Cu Copper |
|---|---|---|
| Atomic number | 17 | 29 |
| Symbol | Cl | Cu |
| Name | Chlorine | Copper |
| Category | halogen | transition-metal |
| Standard Atomic Weight | 35.4515 u | 63.546 u |
| Period | 3 | 4 |
| Group | 17 | 11 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p5 | [Ar]4s13d10 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 6, 7] | [-2, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 3.16 | 1.9 |
| Electron affinity | 3.6127 eV | 1.235 eV |
| Density | 3.214 kg/m³ | 8933 kg/m³ |
| Melting point | -101.5 °C | 1084.62 °C |
| Boiling point | -34.04 °C | 2561.85 °C |
| Discovery year | 1774 | N/A |