3 ms·
Hafnium isn't a rare earth element [1]. [1] https://en.wikipedia.org/wiki/Rare-earth_element https://en.wikipedia.org/wiki/Rare-earth_element
by ridgeguy 6y ago
Hafnium isn't a rare earth element [1].
[1] https://en.wikipedia.org/wiki/Rare-earth_element https://en.wikipedia.org/wiki/Rare-earth_element
- selimthegrim 6y agoThanks for the correction.