Sorry for taking so long on updating this! I'm Incredibly lazy :P

So without further ado, here we go!

Something certain doctors use,
Can be found in propeller shapes,
and encapsulated in fullerene molecules.

This Element is indeed a lanthanide.
Take away three of its electrons,

and it wil radiate light.

Sorry, this sucked so much, I'm not good at this. But yeah, have fun guessing!

~Blue