AP Chem / Learning Polyatomic Ions

Polyatomic Ions, Chem symbol, & Oxi #

ammonium ( 1+ )

NH₄⁺

acetate ( 1- )

C₂H₃O₂^-

bicarbonate ( 1- )

HCO₃^-

bisulfate ( 1- )

HSO₄^-

bisulfite ( 1- )

HSO₃^-

bromate ( 1- )

BrO₃^-

Bromite ( 1- )

BrO₂^-

carbonate (2-)

CO₃^2-

chlorate (1- )

CIO₃^-

chlorite (1- )

CIO₂^-

chromate ( 2- )

CrO₄^2-

cyanide (1- )

CN^-

dichromate (2-)

Cr₂O₇^2-

ferrocyanide ( 4- )

Fe(CN) ₆^4-

ferricyanide ( 3- )

Fe(CN)₆^3-

hydroxide ( 1- )

OH^-

hypobromite ( 1- )

BrO^-

hypochlorite ( 1- )

CIO^-

hypoiodate (1- )

IO^-

iodate ( 1-)

IO₃^-

Iodite ( 1- )

IO₂^-

nitrate ( 1- )

NO₃^-

nitrite ( 1- )

NO₂^-