Hafnium is a chemical element; it has symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1922, by Dirk Coster and George de Hevesy.

hafnium (Hf), chemical element (atomic number 72), metal of Group 4 (IVb) of the periodic table. It is a ductile metal with a brilliant silvery lustre. The Dutch physicist Dirk Coster and the Hungarian Swedish chemist George Charles von Hevesy discovered (1923) hafnium in Norwegian and Greenland zircons by analyzing their X-ray spectra.

Hafnium is a chemical element with symbol Hf and atomic number 72. Classified as a transition metal, Hafnium is a solid at room temperature.

2025年2月1日 · Hafnium (symbol: Hf, atomic number: 72) is a transition metal that is similar in many ways to zirconium. You probably do not encounter this element much, aside from its occurrence in some gemstones and integrated circuits.

Learn about the atomic number 72. Which element's atomic number is 72? List the atomic symbol, weight, density, number of protons and other element properties.

Hafnium is the 72nd element in the periodic table and has a symbol of Hf and atomic number of 72. It has an atomic weight of 178.49 and a mass number of 180. Hafnium has seventy-two protons and one hundred eight neutrons in its nucleus, and seventy-two electrons in six shells.

Hafnium is a greyish-silver lustrous metal. It is a transition metal and resembles zirconium in its chemical properties, as both have equal number of valence electrons. It is ductile and is resistant to corrosion. Hafnium is denser than zirconium. Chemical Characteristics. Hafnium is resistant to attacks by concentrated alkalis.

2020年1月24日 · Atomic Number: 72; Appearance: Steel gray metal; Group: Group 4 (Transition Metal) Period: Period 6; Discovery: Dirk Coster and George de Hevesy (1922)

Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent Transition Metal, hafnium chemically resembles zirconium and is found in zirconium minerals.

2024年10月8日 · Hafnium (chemical symbol Hf, atomic number 72) is a little-known but incredibly important element that plays a vital role in some of the most advanced technologies we use today.