atomic number 21, n.
a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
<noun.substance>
Sc atomic number 21 scandium
Word
a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
<noun.substance>
Sc atomic number 21 scandium