Iridium (Ir)
Iridium
Iridium (Ir) is a transition metal in period 6, group 9. Its relative atomic mass is 192.22 and the molar mass of the atom is 192.22 g/mol.
Atomic number 77
Atomic mass 192.22
Molar mass 192.22 g/mol
Category Transition metal Solid
Properties of iridium
| Atomic number | 77 |
|---|---|
| Symbol | Ir |
| Latin name | Iridium |
| Relative atomic mass | 192.22 |
| Molar mass | 192.22 g/mol |
| Group, period, block | 9, 6, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f¹⁴ 5d⁷ 6s² |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius | 135 pm |
Electron configuration of iridium
Electrons per shell
K2L8M18N32O15P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁷ 6s²
Noble-gas notation
77 protons · 77 electrons[Xe] 4f¹⁴ 5d⁷ 6s²
Formula and compounds of iridium
Simple substanceIriridiumMolar mass of Ir: 192.22 g/mol
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Frequently asked questions
The relative atomic mass of iridium is 192.22, so the molar mass of the atom is 192.22 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁷ 6s². Noble-gas notation: [Xe] 4f¹⁴ 5d⁷ 6s².