हिन्दी में पढ़ेंHome › Elements › Osmium
Osmium (Os)
Atomic number 76 · transition
| Atomic number | 76 |
|---|---|
| Atomic mass | 190.23 u |
| Molar mass | 190.23 g/mol |
| Category | transition |
| Group / period / block | 8 / 6 / d |
| Electron configuration | [Xe] 4f14 5d6 6s2 |
| Electrons per shell | 2, 8, 18, 32, 14, 2 |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius | 130.0 pm |
| Density | 22.5872 g/cm³ |
| First ionisation energy | 8.4382 eV |
| Melting point | 3306.15 K (3033.00 °C) |
| Boiling point | 5281.15 K (5008.00 °C) |
| Common oxidation states | +4 |
| Abundance in Earth's crust | 0.0015 ppm |
Uses
Fountain-pen tips — the densest element
Discovery
1804, Smithson Tenant