Fluorine vs Thallium
| Property | F Fluorine | Tl Thallium |
|---|---|---|
| Atomic number | 9 | 81 |
| Symbol | F | Tl |
| Name | Fluorine | Thallium |
| Category | halogen | post-transition-metal |
| Standard Atomic Weight | 18.998403 u | 204.3835 u |
| Period | 2 | 6 |
| Group | 17 | 13 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Xe]6s24f145d106p1 |
| Oxidation states | -1 | [-5, -2, -1, 1, 2, 3] |
| Electronegativity (Pauling) | 3.98 | 1.62 |
| Electron affinity | 3.4011 eV | 0.377 eV |
| Density | 1.696 kg/m³ | 1.180000e+4 kg/m³ |
| Melting point | -219.62 °C | 303.85 °C |
| Boiling point | -188.12 °C | 1472.85 °C |
| Discovery year | 1886 | 1861 |