Here's the breakdown:

* Fe represents the iron element, specifically the ferrous ion (Fe²⁺) with a +2 charge.

* F represents the fluorine element, which has a -1 charge as a fluoride ion (F⁻).

To balance the charges, you need two fluoride ions (2 x -1 = -2) to match the +2 charge of the ferrous ion. Therefore, the formula becomes FeF₂.