| Atomic Number: | 27 |
| Element Symbol: | Co |
| Element Name: | Cobalt |
| Atomic Weight: | 58.933200 |
| Group Number: | 9 |
| Group Name: | none |
| Period Number: | 4 |
| Block: | d-block |
| Ground State Configuration: | [Ar] 3d7 4s2 |
| Ground State Level: | 4F9/2 |
| Standard State: | Solid |
| Bond Length: | 250.6 |
| Atomic Radius Empirical: | 135 |
| Atomic Radius Calculated: | 152 |
| Covalent Radius Empirical: | 126 |
| Electron Affinity: | 63.7 |
| First Ionization Energy: | 760.4 |
| Pauling Electronegativity: | 1.88 |
| Sanderson Electronegativity: | 2.56 |
| Allred Rochow Electronegativity: | 1.70 |
| Density Of Solid: | 8900 |
| Molar Volume: | 6.67 |
| Velocity Of Sound: | 4720 |
| Youngs Modulus: | 209 |
| Rigidity Modulus: | 75 |
| Bulk Modulus: | 180 |
| Poissons Ratio: | 0.31 |
| Mineral Hardness: | 5.0 |
| Brinell Hardness: | 700 |
| Vickers Hardness: | 1043 |
| Electrical Resistivity: | 6 |
| Reflectivity: | 67 |
| Melting Point: | 1495 |
| Boiling Point: | 2927 |
| Thermal Conductivity: | 100 |
| Coefficient Of Linear Expansion: | 13.0 |
| Enthalpy Of Fusion: | 16.2 |
| Enthalpy Of Vaporization: | 375 |
| Enthalpy Of Atmization: | 426 |
| Most Common Oxidation Numbers: | 3,2 |
| Color: | Lustrous, metallic, greyish tinge |
| Classification: | Metallic |
| Discovered By: | Georg Brandt |
| Discovered At: | Sweden |
| Discovered When: | 1735 |
| Origin Of Name: | From the German word kobald meaning goblin or evil spirit |
Calculate the molecular weight of Cobalt or molecular weight Co.
Also see the full list of chemical elements and atomic weights.