Hydrogen vs Osmium
| Property | H Hydrogen | Os Osmium |
|---|---|---|
| Atomic number | 1 | 76 |
| Symbol | H | Os |
| Name | Hydrogen | Osmium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 190.23 u |
| Period | 1 | 6 |
| Group | 1 | 8 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Xe]6s24f145d6 |
| Oxidation states | [-1, 1] | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8] |
| Electronegativity (Pauling) | 2.2 | 2.2 |
| Electron affinity | 0.75419 eV | 1.1 eV |
| Density | 0.08988 kg/m³ | 2.258720e+4 kg/m³ |
| Melting point | -259.34 °C | 3032.85 °C |
| Boiling point | -252.87 °C | 5011.85 °C |
| Discovery year | 1766 | 1803 |