Polyatomic Ions

CH3COO-1

Acetate

NH4+1

Ammonium

BrO3-1

Bromate

CO3-2

Carbonate

ClO3-1

Chlorate

CrO4-2

Chromate

CN-1

cyanide

Cr2O7-2

Dichromate

OH-1

Hydroxide

IO3-1

iodate

Hg2+2

Mercury(I)

NO3-1

Nitrate

OOCCOO-2/C2O4-2

Oxalate

MnO4-1

Permanganate

O2-2

Peroxide

PO4-3

Phosphate

SO4-2

Sulfate

bi-/hydrogen

prefix that indicates a hydrogen is added to the ion (Hydrogen increases the charge by one)

-ate

Suffix with one more oxygen than the suffix -ite (Must know how many oxygen ions are in the other form to determine the number of oxygen ions in this form)

-ite

Suffix with one less oxygen than the suffix -ate (Must know how many oxygen ions are in the other form to determine the number of oxygen ions in this form)