AP Chemistry Polyatomic Ion List (Richards)

For Mr. Richards's first period class

ammonium

NH₄⁺

hydronium

H₃O⁺

mercury I

Hg₂²⁺

dihydrogen phosphate

H₂PO₄^-

hydrogen carbonate

HCO₃^-

hydrogen sulfite

HSO₃^-

hydrogen sulfate

HSO₄^-

nitrite

NO₂^-

nitrate

NO₃^-

hydroxide

OH^-

acetate

CH₃COO^-

cyanide

CN^-

cyanate

CNO^-

thiocyanate

CNS^-

superoxide

O₂^-

permanganate

MnO₄^-

hypochlorite

ClO^-

chlorite

ClO₂^-

chlorate

ClO₃^-

perchlorate

ClO₄^-

bromate

BrO₃^-

iodate

IO₃^-

hydrogen phosphate

HPO₄^2-

carbonate

CO₃^2-

sulfite

SO₃^2-

sulfate

SO₄^2-

thiosulfate

S₂O₃^2-

silicate

SiO₃^2-

oxalate

C₂O₄^2-

chromate

CrO₄^2-

dichromate

Cr₂O₇^2-

molybdate

MoO₄^2-

peroxide

O₂^2-

phosphate

PO₄^3-

arsenate

AsO₄^3-