Chlorine vs Rubidium
| Property | Cl Chlorine | Rb Rubidium |
|---|---|---|
| Atomic number | 17 | 37 |
| Symbol | Cl | Rb |
| Name | Chlorine | Rubidium |
| Category | halogen | alkali-metal |
| Standard Atomic Weight | 35.4515 u | 85.4678 u |
| Period | 3 | 5 |
| Group | 17 | 1 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p5 | [Kr]5s1 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 6, 7] | [-1, 1] |
| Electronegativity (Pauling) | 3.16 | 0.82 |
| Electron affinity | 3.6127 eV | 0.4859 eV |
| Density | 3.214 kg/m³ | 1530 kg/m³ |
| Melting point | -101.5 °C | 39.31 °C |
| Boiling point | -34.04 °C | 687.85 °C |
| Discovery year | 1774 | 1861 |