Fluorine vs Chlorine
| Property | F Fluorine | Cl Chlorine |
|---|---|---|
| Atomic number | 9 | 17 |
| Symbol | F | Cl |
| Name | Fluorine | Chlorine |
| Category | halogen | halogen |
| Standard Atomic Weight | 18.998403 u | 35.4515 u |
| Period | 2 | 3 |
| Group | 17 | 17 |
| Block | p | p |
| Phase at STP | gas | gas |
| Electron configuration | [He]2s22p5 | [Ne]3s23p5 |
| Oxidation states | -1 | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 3.98 | 3.16 |
| Electron affinity | 3.4011 eV | 3.6127 eV |
| Density | 1.696 kg/m³ | 3.214 kg/m³ |
| Melting point | -219.62 °C | -101.5 °C |
| Boiling point | -188.12 °C | -34.04 °C |
| Discovery year | 1886 | 1774 |