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Chemical element: Chromium (Cr)
| Atomic Number: | 24 |
| Element Symbol: | Cr |
| Element Name: | Chromium |
| Atomic Weight: | 51.9961 |
| Group Number: | 6 |
| Group Name: | none |
| Period Number: | 4 |
| Block: | d-block |
| Ground State Configuration: | [Ar] 3d5 4s |
| Ground State Level: | 7S3 |
| Standard State: | Solid |
| Bond Length: | 249.8 |
| Atomic Radius Empirical: | 140 |
| Atomic Radius Calculated: | 166 |
| Covalent Radius Empirical: | 127 |
| Electron Affinity: | 64.3 |
| First Ionization Energy: | 652.9 |
| Pauling Electronegativity: | 1.66 |
| Sanderson Electronegativity: | 1.66 |
| Allred Rochow Electronegativity: | 1.56 |
| Density Of Solid: | 7140 |
| Molar Volume: | 7.23 |
| Velocity Of Sound: | 5940 |
| Youngs Modulus: | 279 |
| Rigidity Modulus: | 115 |
| Bulk Modulus: | 160 |
| Poissons Ratio: | 0.21 |
| Mineral Hardness: | 8.5 |
| Brinell Hardness: | 1120 |
| Vickers Hardness: | 1060 |
| Electrical Resistivity: | 12.7 |
| Melting Point: | 1907 |
| Boiling Point: | 2671 |
| Thermal Conductivity: | 94 |
| Coefficient Of Linear Expansion: | 4.9 |
| Enthalpy Of Fusion: | 20.5 |
| Enthalpy Of Vaporization: | 339 |
| Enthalpy Of Atmization: | 397 |
| Most Common Oxidation Numbers: | 6,3 |
| Color: | Silvery metallic |
| Classification: | Metallic |
| Discovered By: | Louis-Nicholas Vauquelin |
| Discovered At: | France |
| Discovered When: | 1797 |
| Origin Of Name: | From the Greek word chroma meaning colour, named for the many coloured compounds known for chromium. |
Calculate the molecular weight of Chromium or molecular weight Cr.
Also see the full list of chemical elements and atomic weights.
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