Question

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Zn2+, Fe2+, F-, S2-

Answer 1

Just make a bunch of binary compounds (ionic-non metal, metal)

Make sure that the charges equal 0.

I'll give you one.

Zn2+ states that the molecule has a +2 charge. You can use F- to counter that to make a compound by making it f2.

ZnF2