Hafnium - Wikipedia
网页Hafnium is a shiny, silvery, ductile metal that is corrosion -resistant and chemically similar to zirconium [8] in that they have the same number of valence electrons and are in the same group.
Hafnium - Element information, properties and uses | Periodic Table
网页A shiny, silvery metal that resists corrosion and can be drawn into wires. Uses. Hafnium is a good absorber of neutrons and is used to make control rods, such as those found in nuclear submarines. It also has a very high melting point and because of this is used in plasma welding torches.
Hafnium | Definition, Atomic Mass, Properties, Uses, & Facts
网页2024年9月6日 · Hafnium, chemical element, metal of Group 4 (IVb) of the periodic table. It is a ductile metal with a brilliant silvery luster. It is dispersed in Earth’s crust to the extent of three parts per million and is invariably found in zirconium minerals up to a few percent compared with zirconium.
Hafnio - Wikipedia, la enciclopedia libre
网页El hafnio es un elemento químico de número atómico 72 que se encuentra en el grupo 4 de la tabla periódica de los elementos y se simboliza como Hf. Es un metal de transición, brillante, gris-plateado, químicamente muy parecido al circonio, encontrándose en los mismos minerales y compuestos, y siendo difícil separarlos.
Hafnium controversy - Wikipedia
网页The hafnium controversy was a debate over the possibility of 'triggering' rapid energy releases, via gamma ray emission, from a nuclear isomer of hafnium, 178m2Hf. Per event the energy release is 5 orders of magnitude (100,000 times) more energetic than in a typical chemical reaction, but 2 orders of magnitude less than a nuclear fission reaction.
Hafnium (group) - Wikipedia
网页Hafnium (sometimes styled HAFNIUM; also called Silk Typhoon by Microsoft [1]) is a cyber espionage group, sometimes known as an advanced persistent threat, with alleged ties to the Chinese government. [2][3][4] Hafnium is closely connected to APT40. [5]
Hafnium (Hf) - Periodic Table
网页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 summary | Britannica
网页hafnium, Metallic chemical element, one of the transition elements, chemical symbol Hf, atomic number 72. A ductile metal with a brilliant silvery lustre, it was discovered in 1923 in Copenhagen, Den., and given a name derived from the Latin name of that city. Hafnium has high corrosion resistance.
Facts About Hafnium - Live Science
网页2018年3月31日 · Hafnium is a lustrous, silvery-gray transition metal. Discovered in 1923, it was the next-to-last element with stable nuclei to be added to the periodic table (the final one was rhenium in 1925)....
Hafnium - an overview | ScienceDirect Topics
网页Hafnium (Hf) is a refractory metal with a high melting point. Hf is exploited to produce the elements of reactor control and shielding systems and containers for storing radioactive materials for its good neutron-physical, mechanical, and corrosion properties.
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