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Chemical element: Iridium (Ir)
| Atomic Number: | 77 |
| Element Symbol: | Ir |
| Element Name: | Iridium |
| Atomic Weight: | 192.217 |
| Group Number: | 9 |
| Group Name: | Precious metal or Platinum group metal |
| Period Number: | 6 |
| Block: | d-block |
| Ground State Configuration: | [Xe] 4f14 5d7 6s2 |
| Ground State Level: | 4F9/2 |
| Standard State: | Solid |
| Bond Length: | 271.4 |
| Atomic Radius Empirical: | 135 |
| Atomic Radius Calculated: | 180 |
| Covalent Radius Empirical: | 137 |
| Electron Affinity: | 151.0 |
| First Ionization Energy: | 880 |
| Pauling Electronegativity: | 2.20 |
| Allred Rochow Electronegativity: | 1.55 |
| Density Of Solid: | 22650 |
| Molar Volume: | 8.52 |
| Velocity Of Sound: | 4825 |
| Youngs Modulus: | 528 |
| Rigidity Modulus: | 210 |
| Bulk Modulus: | 320 |
| Poissons Ratio: | 0.26 |
| Mineral Hardness: | 6.5 |
| Brinell Hardness: | 1670 |
| Vickers Hardness: | 1760 |
| Electrical Resistivity: | 4.7 |
| Reflectivity: | 78 |
| Melting Point: | 2466 |
| Boiling Point: | 4428 |
| Superconduction Temperature: | -273.04 |
| Thermal Conductivity: | 150 |
| Coefficient Of Linear Expansion: | 6.4 |
| Enthalpy Of Fusion: | 26 |
| Enthalpy Of Vaporization: | 560 |
| Enthalpy Of Atmization: | 671 |
| Most Common Oxidation Numbers: | 4,3 |
| Color: | Silvery white |
| Classification: | Metallic |
| Discovered By: | Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils |
| Discovered At: | England, France |
| Discovered When: | 1803 |
| Origin Of Name: | From the Greek word iris meaning rainbow |
Calculate the molecular weight of Iridium or molecular weight Ir.
Also see the full list of chemical elements and atomic weights.
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