I NEED HELP!!!!
Given the table below, what is the chemical formula for a compound between Na and the sulfate ion SO4 -2?

Anitrate ion NO3 -1
Bphosphate PO4 -3
Csulfate SO4 -2
Dacetate C2H3O2 -1
Eammonium NH4 +1

F. chromate CrO4 -2

G. carbonate CO3 -2

H. dichromate Cr2O7 -2

I. permanganate MnO4 -1

J. sulfite SO3 -2