copper (II) chloride (chemical formula help!)

Question

How do you write copper (II) chloride as a chemical formula?

Answer 1

Copper (II) Chloride is written as follows: CuCl₂. This is because the (II) means the oxidation state of copper is +2, while the oxidation state of Chlorine is -1. If you criss cross, chlorine needs to have two in order to cancel copper's positive charge so the molecule can be neutral.