Here's why:
* Scandium is a metal in group 3 of the periodic table, meaning it typically forms a +3 cation (Sc³⁺).
* Chlorine is a nonmetal in group 17, meaning it typically forms a -1 anion (Cl⁻).
To balance the charges, three chlorine atoms are needed for every scandium atom. This results in the chemical formula ScCl₃.
Scandium chloride is a white, hygroscopic solid that is highly soluble in water. It is used in various applications, including:
* High-intensity lighting
* Production of other scandium compounds
* Catalysis
* Electronic materials
