metal
Assuming it's scandium(III), which is its most common valence state, the formula would be Sc2Se3.
Scandium is Sc.
Scandium Phosphate
Name: scandium Symbol: Sc
Scandium is a natural chemical element.
The chemical formula for scandium is Sc and for iodine is I2.
Scandium has a higher oxidation state than calcium. Scandium typically exhibits a +3 oxidation state, while calcium usually shows a +2 oxidation state.
Scandium has the chemical symbol Sc and 21 is it's atomic number. A link is provided to the Wikipedia article on this (usually considered) rare earth element.
Scandium is a natural chemical element; minerals containing scandium: thortveitite, euxenite, gadolinite.
Scandium is a natural chemical element, metal, solid, rare.
Scandium oxide (or Discandium trioxide) - Sc2O3
Scandium has four electronic shells with 2, 8, 9, 2 electrons.