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Hace 3 días · INTRODUCTION. Rare earth elements (REEs) include the 4f-block lanthanide series (atomic number 57–70) and three d-block elements: lutetium, scandium and yttrium (Cheisson & Schelter, 2019).With broad applications in electronic components, catalysts, lasers, glass, medicine and permanent magnets, REEs are becoming increasingly important to the global economy, with global production of REEs ...
Hace 5 días · rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 ( scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table ( cerium [Ce] through lutetium [Lu]).
Hace 4 días · Nickel has two atomic electron configurations, [Ar] 3d 8 4s 2 and [Ar] 3d 9 4s 1, which are very close in energy; [Ar] denotes the complete argon core structure. There is some disagreement on which configuration has the lower energy. Chemistry textbooks quote nickel's electron configuration as [Ar] 4s 2 3d 8, also written [Ar] 3d 8 4s 2.
Hace 1 día · Credit: Prof. Juan Diego Rodriguez-Blanco, Trinity College Dublin. A collaborative team of researchers has made a cracking discovery with the potential to make a significant impact in the ...
Hace 14 horas · Depositphotos. View 2 Images. Using humble waste eggshells to pull rare earth elements from water, researchers have developed a simple, low-cost and sustainable procedure to provide the essential ...
Hace 3 días · Alkaline-earth metal, any of the six chemical elements that comprise Group 2 of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The alkaline-earth elements are highly metallic and are good conductors of electricity.
Hace 3 días · Rare earths are a series of 17 chemical elements in the earth’s crust vital to many modern technologies. While the elements aren’t rare, ore bodies containing sufficient concentrations to make processing economically viable are exceedingly rare.
