Thallium vs Bismuth
| Property | Tl Thallium | Bi Bismuth |
|---|---|---|
| Atomic number | 81 | 83 |
| Symbol | Tl | Bi |
| Name | Thallium | Bismuth |
| Category | post-transition-metal | post-transition-metal |
| Standard Atomic Weight | 204.3835 u | 208.9804 u |
| Period | 6 | 6 |
| Group | 13 | 15 |
| Block | p | p |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f145d106p1 | [Xe]6s24f145d106p3 |
| Oxidation states | [-5, -2, -1, 1, 2, 3] | [-3, -2, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 1.62 | 2.02 |
| Electron affinity | 0.377 eV | 0.942 eV |
| Density | 1.180000e+4 kg/m³ | 9807 kg/m³ |
| Melting point | 303.85 °C | 271.4 °C |
| Boiling point | 1472.85 °C | 1563.85 °C |
| Discovery year | 1861 | 1753 |