Atomic NumberAtomic Number of Hafnium
Atomic Number of Hafnium is 72.
Chemical symbol for Hafnium is Hf. Number of protons in Hafnium is 72. Atomic weight of Hafnium is 178.49 u or g/mol. Melting point of Hafnium is 2150 °C and its the boiling point is 5400 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Hafnium
Hafnium is a chemical element discovered relatively recently and given the name after the Latin word for Copenhagen. It is a shiny metal of light grey color which is quite well resistive to corrosion. It is usually obtained from natural zirconium ores, and also it can be synthesized in the labs. This element has no biological importance. It is mainly used in nuclear reactors and for welding processes, and its alloys with such metals as titanium, iron, and others, are used as super strong steels in various production fields. In chemical industry, hafnium is sometimes used as an effective catalyst for various chemical processes.
Properties of Hafnium Element
| Atomic Number (Z) | 72 |
|---|---|
| Atomic Symbol | Hf |
| Group | 4 |
| Period | 6 |
| Atomic Weight | 178.49 u |
| Density | 13.31 g/cm3 |
| Melting Point (K) | 2506 K |
| Melting Point (℃) | 2150 °C |
| Boiling Point (K) | 4876 K |
| Boiling Point (℃) | 5400 °C |
| Heat Capacity | 0.144 J/g · K |
| Abundance | 3 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Transition metal |
| Electronegativity (Pauling) χ | 1.3 |
| Ionization Energy (eV) | 6.82507 |
| Atomic Radius | 155pm |
| Covalent Radius | 150pm |
| Valence Electrons | 2 |
| Year of Discovery | 1923 |
| Discoverer | Coster and vón Hevesy |