Atomic Number of Hafnium

Hafnium Atomic Number

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.

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About 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 SymbolHf
Atomic Weight178.49 u
Density13.31 g/cm3
Melting Point (K)2506 K
Melting Point (℃)2150 °C
Boiling Point (K)4876 K
Boiling Point (℃)5400 °C
Heat Capacity0.144 J/g · K
Abundance3 mg/kg
State at STPSolid
DescriptionTransition metal
Electronegativity (Pauling) χ1.3
Ionization Energy (eV)6.82507
Atomic Radius155pm
Covalent Radius150pm
Valence Electrons2
Year of Discovery1923
DiscovererCoster and vón Hevesy

What is the Boiling Point of Hafnium?

Hafnium boiling point is 5400 °C. Boiling point of Hafnium in Kelvin is 4876 K.

What is the Melting Point of Hafnium?

Hafnium melting point is 2150 °C. Melting point of Hafnium in Kelvin is 2506 K.

How Abundant is Hafnium?

Abundant value of Hafnium is 3 mg/kg.

What is the State of Hafnium at Standard Temperature and Pressure (STP)?

State of Hafnium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Hafnium Discovered?

Hafnium was discovered in 1923.

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