Rhenium vs Thallium
| Property | Re Rhenium | Tl Thallium |
|---|---|---|
| Atomic number | 75 | 81 |
| Symbol | Re | Tl |
| Name | Rhenium | Thallium |
| Category | transition-metal | post-transition-metal |
| Standard Atomic Weight | 186.207 u | 204.3835 u |
| Period | 6 | 6 |
| Group | 7 | 13 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f145d5 | [Xe]6s24f145d106p1 |
| Oxidation states | [-3, -1, 0, 1, 2, 3, 4, 5, 6, 7] | [-5, -2, -1, 1, 2, 3] |
| Electronegativity (Pauling) | 1.9 | 1.62 |
| Electron affinity | 0.15 eV | 0.377 eV |
| Density | 2.080000e+4 kg/m³ | 1.180000e+4 kg/m³ |
| Melting point | 3185.85 °C | 303.85 °C |
| Boiling point | 5595.85 °C | 1472.85 °C |
| Discovery year | 1925 | 1861 |