Osmium vs Flerovium
| Property | Os Osmium | Fl Flerovium |
|---|---|---|
| Atomic number | 76 | 114 |
| Symbol | Os | Fl |
| Name | Osmium | Flerovium |
| Category | transition-metal | post-transition-metal |
| Standard Atomic Weight | 190.23 u | 289 u |
| Period | 6 | 7 |
| Group | 8 | 14 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [Xe]6s24f145d6 | [Rn] 7s27p2 5f14 6d10(predicted) |
| Oxidation states | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8] | [0, 1, 2, 4, 6] |
| Electronegativity (Pauling) | 2.2 | N/A |
| Electron affinity | 1.1 eV | -0.5 eV |
| Density | 2.258720e+4 kg/m³ | 9928 kg/m³ |
| Melting point | 3032.85 °C | -273.15 °C |
| Boiling point | 5011.85 °C | -63.15 °C |
| Discovery year | 1803 | 1998 |