Polyatomic Ions

What does the suffix "Hyper" or "Per" mean?

This compound has the most number of oxygen atoms.

What does the suffix "-ate" mean?

This compound has more oxygen atoms.

What does the suffix "-ite" mean?

This compound has less oxygen atoms.

What does the suffix "Hypo" mean?

This compound has the least amount of oxygen atoms.

Ammonium

NH₄⁺

Permanganate

MnO₄^-

Acetate

C₂H₃O₂^-

Nitrate

NO₃^-

Nitrite

NO₂^-

Cyanide

CN^-

Thiocyanate

SCN^-

Hydroxide

OH^-

Bicarbonate

HCO₃^-

Dichromate

Cr₂O₇^2-

Chromate

CrO₄^2-

Phosphate

PO₄^3-

Phosphite

PO₃^3-

Bisulfate

HSO₄^-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Bisulfite

HSO₃^-

Carbonate

CO₃^2-

Perchlorate

ClO₄^-

Chlorate

ClO₃^-

Chlorite

ClO₂^-

Hypochlorite

ClO^-

Periodate

IO₄^-

Iodate

IO₃^-

Iodite

IO₂^-

Hypoiodite

IO^-

Perbromate

BrO₄^-

Bromate

BrO₃^-

Bromite

BrO₂^-

Hypobromite

BrO^-

Arsenate

AsO₄^3-

Formate

HCOO^-

Thiosulfate

S₂O₃^2-

Borate

BO₃^3-

Meta-Silicate

SiO₃^2-

Oxalate

C₂O₄^2-

Hydrogen Phosphate

HPO₄^2-

Dihydrogen Phosphate

H₂PO₄^-