Polyatomic Ions

Ammonium

NH₄⁺

Permanganate

MnO₄^-

Bromate

BrO₃^-

Thiosulfate

S₂O₃^2-

Selenate

SeO₄^2-

Phosphate

PO₄^3-

Nitrate

NO₃^-

Thiocyanate

SCN^-

Acetate

C₂H₃O₂^-

Carbonate

CO₃^2-

Peroxide

O₂^2-

Hydroxide

OH^-

Cyanide

CN^-

Silicate

SiO₃^2-

Chromate

CrO₄^2-

Oxalate

C₂O₄^2-

Chlorate

ClO₃^-

Iodate

IO₃^-

Sulfate

SO₄^2-

Dichromate

Cr₂O₇^2-

Arsenate

AsO₄^3-

-ite

Removes 1 Oxygen from common ion

Hypo- + -ite

Removes 2 Oxygens from common ion

Per-

Add 1 Oxygen to common ion

Bi-

Add Hydrogen and raise charge number by 1

Hydrogen

add Hydrogen (?)

Dihydrogen

Add 2 hydrogens and raise charge by 2