Rare earth elements
Rare earth element is a collective name for 17 special elements. It is named because Swedish scientists used rare earth compounds when extracting rare earth elements, so the name rare earth elements.
Mar 10, 2021
Rare earth elements
Rare earth element is a collective name for 17 special elements. It is named because Swedish scientists used rare earth compounds when extracting rare earth elements, so the name rare earth elements.
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