Search results
Results From The WOW.Com Content Network
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, [9] together with yttrium and the lanthanides. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. [10]
China just restricted exports to 28 American defense firms. ... its back in terms of critical minerals production. ... supply chains for rare earths, niobium, scandium, titanium metal, vanadium ...
Naturally occurring scandium (21 Sc) is composed of one stable isotope, 45 Sc. Twenty-seven radioisotopes have been characterized, with the most stable being 46 Sc with a half-life of 83.8 days, 47 Sc with a half-life of 3.35 days, and 48 Sc with a half-life of 43.7 hours and 44 Sc with a half-life of 3.97 hours.
Ce, La, and Nd are important in alloy making, and in the production of fuel cells and nickel-metal hydride batteries. Ce, Ga, and Nd are important in electronics and are used in the production of LCD and plasma screens, fiber optics, and lasers, [132] and in medical imaging. Additional uses for rare-earth elements are as tracers in medical ...
Scandium hydride is not well understood, although it appears not to be a saline hydride of Sc(II). [5] As is observed for most elements, a diatomic scandium hydride has been observed spectroscopically at high temperatures in the gas phase. [6] Scandium borides and carbides are non-stoichiometric, as is typical for neighboring elements. [7]
AOL latest headlines, entertainment, sports, articles for business, health and world news.
He discovered the element scandium in 1879, by separating out scandium(III) oxide, also known as scandia. [1]: 550 [2] In addition to his work concerning the analytic chemistry of elements and rare earths, he made substantial contributions to Swedish agriculture, including methods of fertilization and the introduction of sugar beets as a crop.
Scandium-44 (44 Sc) is a radioactive isotope of scandium that decays by positron emission to stable 44 Ca with a half-life of 4.042 hours. 44 Sc can be obtained as a daughter radionuclide of long-lived 44 Ti (t 1/2 60.4 a) from 44 Ti / 44 Sc generator or can be produced by nuclear reaction 44 Ca ( p, n) 44 Sc in small cyclotrons.