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Chemical element: Hafnium (Hf)
| Atomic Number: | 72 |
| Element Symbol: | Hf |
| Element Name: | Hafnium |
| Atomic Weight: | 178.49 |
| Group Number: | 4 |
| Group Name: | none |
| Period Number: | 6 |
| Block: | d-block |
| Ground State Configuration: | [Xe] 4f14 5d2 6s2 |
| Ground State Level: | 3F2 |
| Standard State: | Solid |
| Bond Length: | 312.7 |
| Atomic Radius Empirical: | 155 |
| Atomic Radius Calculated: | 208 |
| Covalent Radius Empirical: | 150 |
| First Ionization Energy: | 658.5 |
| Pauling Electronegativity: | 1.3 |
| Allred Rochow Electronegativity: | 1.23 |
| Density Of Solid: | 13310 |
| Molar Volume: | 13.44 |
| Velocity Of Sound: | 3010 |
| Youngs Modulus: | 78 |
| Rigidity Modulus: | 30 |
| Bulk Modulus: | 110 |
| Poissons Ratio: | 0.37 |
| Mineral Hardness: | 5.5 |
| Brinell Hardness: | 1700 |
| Vickers Hardness: | 1760 |
| Electrical Resistivity: | 30 |
| Melting Point: | 2233 |
| Boiling Point: | 4603 |
| Superconduction Temperature: | -273.022 |
| Thermal Conductivity: | 23 |
| Coefficient Of Linear Expansion: | 5.9 |
| Enthalpy Of Fusion: | 25.5 |
| Enthalpy Of Vaporization: | 630 |
| Enthalpy Of Atmization: | 621 |
| Most Common Oxidation Numbers: | 4 |
| Color: | Grey steel |
| Classification: | Metallic |
| Discovered By: | Dirk Coster and George Charles von Hevesy |
| Discovered At: | Denmark |
| Discovered When: | 1923 |
| Origin Of Name: | From the Latin name Hafnia meaning Copenhagen |
Calculate the molecular weight of Hafnium or molecular weight Hf.
Also see the full list of chemical elements and atomic weights.
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