Potassium vs Lead
| Property | K Potassium | Pb Lead |
|---|---|---|
| Atomic number | 19 | 82 |
| Symbol | K | Pb |
| Name | Potassium | Lead |
| Category | alkali-metal | post-transition-metal |
| Standard Atomic Weight | 39.0983 u | 207.2 u |
| Period | 4 | 6 |
| Group | 1 | 14 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s1 | [Xe]6s24f145d106p2 |
| Oxidation states | [-1, 1] | [-4, -2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 0.82 | 2.33 |
| Electron affinity | 0.5014 eV | 0.364 eV |
| Density | 890 kg/m³ | 1.134200e+4 kg/m³ |
| Melting point | 63.38 °C | 327.46 °C |
| Boiling point | 758.85 °C | 1748.85 °C |
| Discovery year | 1807 | 2021 |