Krypton vs Lead
| Property | Kr Krypton | Pb Lead |
|---|---|---|
| Atomic number | 36 | 82 |
| Symbol | Kr | Pb |
| Name | Krypton | Lead |
| Category | noble-gas | post-transition-metal |
| Standard Atomic Weight | 83.798 u | 207.2 u |
| Period | 4 | 6 |
| Group | 18 | 14 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s24f145d106p2 |
| Oxidation states | [0, 1, 2] | [-4, -2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 3 | 2.33 |
| Electron affinity | -1 eV | 0.364 eV |
| Density | 3.733 kg/m³ | 1.134200e+4 kg/m³ |
| Melting point | -157.36 °C | 327.46 °C |
| Boiling point | -153.42 °C | 1748.85 °C |
| Discovery year | 1898 | 2021 |