Tm=THULIUM
Thulium is the rarest of the rare earths (which are actually fairly abundant overall). Because of this, there aren't many uses for this element. It's not toxic, but doesn't serve any known biological function.
Thulium is the rarest of the rare earths (which are actually fairly abundant overall). Because of this, there aren't many uses for this element. It's not toxic, but doesn't serve any known biological function.