Osmium (Os)
Osmium
Osmium (Os) is a transition metal in period 6, group 8. Its relative atomic mass is 190.23 and the molar mass of the atom is 190.23 g/mol.
Atomic number 76
Atomic mass 190.23
Molar mass 190.23 g/mol
Category Transition metal Solid
Properties of osmium
| Atomic number | 76 |
|---|---|
| Symbol | Os |
| Latin name | Osmium |
| Relative atomic mass | 190.23 |
| Molar mass | 190.23 g/mol |
| Group, period, block | 8, 6, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f¹⁴ 5d⁶ 6s² |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius | 130 pm |
Electron configuration of osmium
Electrons per shell
K2L8M18N32O14P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁶ 6s²
Noble-gas notation
76 protons · 76 electrons[Xe] 4f¹⁴ 5d⁶ 6s²
Formula and compounds of osmium
Simple substanceOsosmiumMolar mass of Os: 190.23 g/mol
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Frequently asked questions
The relative atomic mass of osmium is 190.23, so the molar mass of the atom is 190.23 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁶ 6s². Noble-gas notation: [Xe] 4f¹⁴ 5d⁶ 6s².