Formulas of Compounds with Group Ions

Hydroxide Ion

OH-

Nitrate Ion

NO3-

Hydrogencarbonate Ion

HCO3-

Permanganate Ion

MnO4-

Carbonate Ion

CO3^2-

Chromate Ion

CrO4^2-

Dichromate Ion

Cr2O3^2-

Sulfate Ion

SO4^2-

Sulfite Ion

SO3^2-

Thiosullfate Ion

S2O3^2-

Phosphate Ion

PO4^3-

Ammonium Ion

NH4+

Charge of hydroxide ion

1 negative charge

Charge of nitrate ion

1 negative charge

Charge of hydrogencarbonate ion

1 negative charge

Charge of permanganate ion

1 negative charge

Charge of carbonate ion

2 negative charges

Charge of chromate ion

2 negative charges

Charge of dichromate ion

2 negative charges

Charge of sulfate ion

2 negative charges

Charge of sulfite ion

2 negative charges

Charge of thiosulfate ion

2 negative charges

Charge of phosphate ion

3 negative charges

Charge of ammonium ion

1 positive charge