来自MSN2 个月
Properties of rare Earth element finally identified 80 years after discovery
Most rare earth elements are lanthanides – elements ... They then did the same thing with 3+ ions of all the other lanthanides to create points of comparison. As such, they were able to confirm ...
来自MSN1 个月
Scientists Discovered Promethium in 1945. They Only Just Learned What It Actually Does.
One such element is Promethium ... “You cannot utilize all these lanthanides as a mixture in modern advanced technologies, because first you need to separate them,” Santa Jansone-Popova ...