1 gen 1906 anni - Charles James separates
rare earth elements
Descrizione:
Charles James created a method of separating rare earth elements that was used by many other chemists. The elements are now used in objects such as hard drives, glazes, lasers, and superconductors. He was also a charter member of the Mu Chapter of Alpha Chi Sigma.
https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/earthelements.html
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CH 345 Timeline
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