Os
Osmium
Element 76 · Transition metal · Period 6, Group 8
Solid · Discovered 1803
Atomic Properties
| Atomic Number | 76 |
| Atomic Mass | 190.2u |
| Electron Configuration | [Xe]6s2 4f14 5d6 |
| Electronegativity | 2.2Pauling |
| Atomic Radius | 216pm |
| Ionization Energy | 8.7eV |
| Electron Affinity | 1.1eV |
| Oxidation States | +4, +3 |
Physical Properties
| Standard State | Solid |
| Melting Point | 3306K |
| Boiling Point | 5285K |
| Density | 22.57g/cm³ |
| Group Block | Transition metal |
| Year Discovered | 1803 |