| Atomic Number: | 41 |
| Element Symbol: | Nb |
| Element Name: | Niobium |
| Atomic Weight: | 92.90638 |
| Group Number: | 5 |
| Group Name: | none |
| Period Number: | 5 |
| Block: | d-block |
| Ground State Configuration: | [Kr] 4d4 5s |
| Ground State Level: | 6D1/2 |
| Standard State: | Solid |
| Bond Length: | 285.8 |
| Atomic Radius Empirical: | 145 |
| Atomic Radius Calculated: | 198 |
| Covalent Radius Empirical: | 137 |
| Electron Affinity: | 86.1 |
| First Ionization Energy: | 652.1 |
| Pauling Electronegativity: | 1.6 |
| Sanderson Electronegativity: | 1.42 |
| Allred Rochow Electronegativity: | 1.23 |
| Density Of Solid: | 8570 |
| Molar Volume: | 10.83 |
| Velocity Of Sound: | 3480 |
| Youngs Modulus: | 105 |
| Rigidity Modulus: | 38 |
| Bulk Modulus: | 170 |
| Poissons Ratio: | 0.40 |
| Mineral Hardness: | 6.0 |
| Brinell Hardness: | 736 |
| Vickers Hardness: | 1320 |
| Electrical Resistivity: | 15 |
| Melting Point: | 2477 |
| Boiling Point: | 4744 |
| Superconduction Temperature: | -263.9 |
| Thermal Conductivity: | 54 |
| Coefficient Of Linear Expansion: | 7.3 |
| Enthalpy Of Fusion: | 26.8 |
| Enthalpy Of Vaporization: | 690 |
| Enthalpy Of Atmization: | 733 |
| Most Common Oxidation Numbers: | 5 |
| Color: | Grey metallic |
| Classification: | Metallic |
| Discovered By: | Charles Hatchett |
| Discovered At: | England |
| Discovered When: | 1801 |
| Origin Of Name: | From the Greek word Niobe meaning daughter of Tantalus (tantalum is closely related to niobium in the periodic table) |
Calculate the molecular weight of Niobium or molecular weight Nb.
Also see the full list of chemical elements and atomic weights.