Krypton vs Osmium
| Property | Kr Krypton | Os Osmium |
|---|---|---|
| Atomic number | 36 | 76 |
| Symbol | Kr | Os |
| Name | Krypton | Osmium |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 83.798 u | 190.23 u |
| Period | 4 | 6 |
| Group | 18 | 8 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s24f145d6 |
| Oxidation states | [0, 1, 2] | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8] |
| Electronegativity (Pauling) | 3 | 2.2 |
| Electron affinity | -1 eV | 1.1 eV |
| Density | 3.733 kg/m³ | 2.258720e+4 kg/m³ |
| Melting point | -157.36 °C | 3032.85 °C |
| Boiling point | -153.42 °C | 5011.85 °C |
| Discovery year | 1898 | 1803 |