- scandium (Sc), chemical element, a rare-earth metal of Group 3 of the periodic table. Scandium is a silvery white, moderately soft metal. It is fairly stable in air but will slowly change its colour from silvery white to a yellowish appearance because of formation of Sc 2 O 3 oxide on the surface.了解详细信息：scandium (Sc), chemical element, a rare-earth metal of Group 3 of the periodic table. Scandium is a silvery white, moderately soft metal. It is fairly stable in air but will slowly change its colour from silvery white to a yellowish appearance because of formation of Sc 2 O 3 oxide on the surface.www.britannica.com/science/scandiumScandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.www.schoolmykids.com/learn/periodic-table/sc-sca…Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white, rare earth metal that belongs to the transition metals group in the periodic table. Scandium emits no lines in the visible region of the electromagnetic spectrum. Nevertheless, scandium can be detected by its lines in other regions of the spectrum.www.chemistry-online.com/periodic-table/scandium/Scandium (pronunciation SKAN-dee-em) is a soft, light metal exhibiting a high reactivity with air and water, represented by the chemical symbol Sc [1, 4]. It belongs to the family of transition metals, having thirteen isotopes with mass numbers ranging from 40 to 52 of which only Sc-45 is the most common one.www.chemistrylearner.com/scandium.htmlScandium is a silvery metal that is soft and has a density of about three times that of water. Scandium is a transition metal and is also considered a rare earth element due to similar chemical properties (such as difficulty in extracting and in separating from other elements) and existence in the same ores, according to Chemicool.www.livescience.com/29071-scandium.html
- 其他用户还问了以下问题
- 查看更多
前往 Wikipedia 查看全部内容Scandium - Wikipedia
Scandium is a chemical element with the symbol Sc and atomic number 21. It is a silvery-white metallic d-block element. Historically, it has been classified as a rare-earth element, together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from … 展开
Scandium chemistry is almost completely dominated by the trivalent ion, Sc . The radii of M ions in the table below indicate that the chemical … 展开
Aluminium alloys
The main application of scandium by weight is in aluminium-scandium alloys for minor aerospace industry … 展开• Scerri, Eric R. (2007). The Periodic System: Its Story and Its Significance. Oxford, UK: Oxford University Press. ISBN 9780195305739 展开
The world production of scandium is in the order of 15–20 tonnes per year, in the form of scandium oxide. The demand is slightly higher, and both the production and demand keep … 展开
Dmitri Mendeleev, who is referred to as the father of the periodic table, predicted the existence of an element ekaboron, with an atomic mass between 40 and 48 in 1869. Lars … 展开
Elemental scandium is considered non-toxic, though extensive animal testing of scandium compounds has not been done. The median lethal dose (LD50) levels for scandium chloride for rats have been determined as 755 mg/kg for intraperitoneal 展开
CC-BY-SA 许可证中的维基百科文本 Scandium - Element information, properties and uses | Periodic …
网页Scandium is a silvery metal that tarnishes in air, burns easily and reacts with water. It has a low density, a high melting point and is mainly used for research purposes. Learn …
Scandium | Chemical Element, Properties, & Uses
网页Scandium is a rare-earth metal of Group 3 of the periodic table, with a silvery white colour and a high melting point. It is found in some minerals and ores, and has limited applications as an alloying agent and in metal …
钪 - 维基百科，自由的百科全书
An Overview of Scandium (Sc or Element 21)
网页2019年7月3日 · Scandium is a silvery-white transition metal with atomic number 21 and symbol Sc. It is found in minerals and uranium refinement, and used for high-intensity lamps and tracers.
Facts About Scandium - Live Science
网页2016年9月21日 · Learn about scandium, a silvery metal that is soft and has a density of about three times that of water. Find out its history, properties, uses, and abundance on Earth and in space.
Scandium | Elements - RSC Education
网页Scandium is a soft, silvery-white metal which heads Group III of the Periodic Table. It tarnishes in air and burns easily once it has been ignited. Scandium powder reacts with water to form hydrogen gas, and it dissolves in most …
Scandium | History, Uses, Facts, Physical & Chemical …
网页Scandium is a silver-white metal that reacts with water and acids. It is used in alloys, lamps, sports equipment and oil refineries. Learn more about its discovery, properties, isotopes and health effects.
Scandium (Sc) - Periodic Table
网页Scandium is a rare, soft, silvery metallic element with atomic number 21 and symbol Sc. It has ten isotopes, nine of which are radioactive, and belongs to group 3, period 4, …
Scandium (Sc) [21] — Chemical Element — Periodic Table
网页Get the facts about element Scandium (Sc) [21] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including …
