1. Identify the Charges
* Fluorine (F) has a charge of -1 (F⁻).
* Chromium (Cr) has a charge of +2 (Cr²⁺).
2. Balance the Charges
* To achieve a neutral compound, we need two F⁻ ions to balance the +2 charge of the Cr²⁺ ion.
3. Write the Formula
The formula for the compound is CrF₂.
Explanation
The subscript "2" after the F indicates that there are two fluoride ions for every one chromium ion. This ensures the compound is electrically neutral (2 x -1 + 2 = 0).
