Iron (Fe) has a common oxidation state of +2 or +3, while chlorine (Cl) has a common oxidation state of -1. To form a neutral compound, the charges of the ions must balance.

Here's why:

* Fe2Cl would imply that iron has an oxidation state of +1/2. This is not a common oxidation state for iron.

The correct formula for a compound containing iron and chlorine depends on the oxidation state of iron:

* FeCl2 - Iron(II) chloride (where iron has a +2 oxidation state)

* FeCl3 - Iron(III) chloride (where iron has a +3 oxidation state)