The metallic ion in scandium (II) chloride is scandium(II), which is represented as Sc²⁺.

Here's why:

* Scandium (II) indicates that the scandium atom has lost two electrons, giving it a +2 charge.

* Chloride refers to the chlorine anion, Cl⁻.

* To form a neutral compound, the charges of the ions must balance. Since chlorine has a -1 charge, two chloride ions (2 Cl⁻) are needed to balance the +2 charge of the scandium(II) ion.

Therefore, the formula for scandium (II) chloride is ScCl₂.