76 Os 190.233
Osmium
transition metal
Properties
- Atomic number
- 76
- Atomic mass
- 190.233 u
- Category
- transition metal
- Group
- 8
- Period
- 6
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 2.2 (Pauling)
- Density
- 22.59 g/cm³
- Melting point
- 3032.85 °C
- Boiling point
- 5011.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁶
Noble-gas shorthand: [Xe] 4f¹⁴ 5d⁶ 6s²
Electrons per shell: 2, 8, 18, 32, 14, 2 — that's 2 in the outermost shell.
About Osmium
Osmium (from Greek osme (ὀσμή) meaning "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3.
- Discovered by Smithson Tennant
- Appearance: silvery, blue cast
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.