Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: zn2+, fe2+, f-, s2-

For the answer to the question above,the Ionic compounds are the compounds consists of positive and negative ions.
Zn(2+):
ZnBr2:  
ZnS:
Al(+3):
Al203
Al2(SO4)^3
Cl:(1-)
NaCl 
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Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is