1 jan 1906 ano - Charles James separates rare earth elements

Descrição:

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