AP Chem - Common Polyatomic Ions

list of common polyatomic ions (name, formula, and charge)

acetate

acetate

CH₃COO^-

bromate

BrO₃^-

chlorate

ClO₃^-

cyanate

OCN^-

cyanide

CN^-

hydroxide

OH^-

iodate

IO₃^-

nitrate

NO₃^-

permanganate

MnO₄^-

triiodide

I₃^-

carbonate

CO₃^2-

chromate

CrO₄^2-

dichromate

CrO₇^2-

manganate

MnO₄^2-

oxalate

C₂O₄^2-

peroxide

O₂^2-

sulfate

SO₄^2-

phosphate

PO₄^3-

ammonium

NH₄⁺

hydronium

H₃O⁺

bi-

+1 H, adds +1 to charge

thio-

-1 oxy, +1 S, same charge

per-

+1 oxy, same charge

-ite

-1 oxy, same charge

hypo-””-ite

-2 oxy, same charge