common atomic Ions

C2H3O2-

Acetate

NO2-

Nitrite

NO3-

Nitrate

OH-

Hydroxide

CN-

Cyanide

ClO2-

Chlorite

ClO3-

Chlorate

MnO4-

Permanganate

SCN-

Thiocyanate

HCO3-

Bicarbonate (hydrogen carbonate)

SO3 2-

Sulfite

SO4 2-

Sulfate

CO3 2-

Carbonate

CrO4 2-

Chromate

Cr2O7 2-

Dichromate

C2O4 2-

Oxalate

SiO3 2-

Silicate

PO3 3-

Phosphite

PO4 3-

Phosphate

NH4+

Ammonium