Polyatomic Ions

NH4
ammonium ion
OH
hydroxide ion
CN
cyanide ion
Cro4
Chromate ion
Cr2O7 -2
dichromate ion
HCO3 –
hydrogen carbonate ion or
bicarbonate ion
NO2 –
nitrite ion
NO3 –
nitrate ion
SO4 -2
sulfate ion
SO3 -2
sulfite ion
C2H3O2 –
acetate ion
PO4 -3
phosphate ion
MnO4 –
permanganate ion
CO3 -2
carbonate ion
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