Thallium vs Lead
Pick up to 3 elements and see how they stack up.
| Property | Thallium | Lead |
|---|---|---|
| Atomic number | 81 | 82 |
| Atomic mass | 204.38 | 207.2 |
| Electronegativity | 1.62 | 2.33 |
| Melting point | 577 K (303.8 °C) | 600.61 K (327.5 °C) |
| Boiling point | 1,746 K (1,472.8 °C) | 2,022 K (1,748.8 °C) |
| Density | 11.85 g/cm³ | 11.34 g/cm³ |
| Atomic radius | 196 pm | 202 pm |
| Ionization energy | 6.108 eV | 7.417 eV |
| Discovered | 1861 | Ancient |
| Category | Post-transition metal | Post-transition metal |
| State at room temp. | Solid | Solid |
| Block | p | p |
| Group | 13 | 14 |
| Period | 6 | 6 |
| Valence electrons | 3 | 4 |
| Common charges | +1, +3 | +2, +4 |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p1 | [Xe] 4f14 5d10 6s2 6p2 |