Hafnium

Hafnium is a lustrous, silvery, ductile metal generally similar to zirconium. Good corrosion resistance and high strength. Iki tahan korosi amarga pembentukan angel, film oksida sing ora bisa ditembus ing permukaan. The metal is unaffected by alkalis and acids, kajaba asam hidrofluorat. Hafnium angel dipisahake dadi zirconium, amarga kalorone unsur kasebut duwe atom kanthi ukuran padha. Hafnium lan paduan iki digunakake kanggo batang kendali ing reaktor nuklir lan kapal selam nuklir amarga hafnium banget nyerep neutron lan nduweni titik leleh sing dhuwur banget lan tahan korosi. Iki digunakake ing paduan lan keramik kanthi suhu dhuwur, amarga sawetara senyawa kasebut pancen akeh banget: dheweke ora bakal lebur kajaba ing suhu sing paling ekstrem.

Hafnium (atomic symbol: Hf, atomic number: 72) is a Block D, Group 4, Period 6 element with an atomic weight of 178.49. The number of electrons in each of Hafnium’s shells is 2, 8, 18, 32, 10, 2 and its electron configuration is [Xe] 4f14 5d2 6s2. The hafnium atom has a radius of 159 pm and a Van der Waals radius of 212 pm. Hafnium was predicted by Dmitri Mendeleev in 1869 but it was not until 1922 that it was first isolated Dirk Coster and George de Hevesy.

In its elemental form, hafnium has a lustrous silvery-gray appearance. Hafnium does not exist as a free element in nature. It is found in zirconium compounds such as zircon. Hafnium is often a component of superalloys and circuits used in semiconductor device fabrication. Its name is derived from the Latin word Hafnia, meaning Copenhagen, where it was discovered. Data ing ndhuwur mung kanggo informasi. Paduan Eagle ora tanggung jawab kanggo akurasi konten utawa aplikasi kasebut. Gambar bagean sing wis rampung bisa diterusake menyang pihak katelu kanggo outsourcing.