Here's how to determine the charge on the copper ion in CuF₂:

* Fluorine's Charge: Fluorine (F) is a halogen and always has a -1 charge in ionic compounds.

* Balancing Charges: Since there are two fluorine ions (F⁻) in the compound, their total charge is -2. To balance this, the copper ion (Cu) must have a +2 charge.

Therefore, the charge on the copper ion in CuF₂ is +2.