Polyatomic memorization

Ammonium

NH₄¹⁺

Hydronium

H₃O¹⁺

Acetate

C₂H₃O₂^1-

Bromate

BrO₃^1-

Bromite

BrO₂^1-

Nitrate

NO₃^1-

Permanganate

MnO₄^1-

Thiocyanate

SCN^1-

Carbonate

CO₃^2-

Chromate

CrO₄^2-

Perchlorate

ClO₄^1-

Chrlorate

ClO₃^1-

Chlorite

ClO₂^1-

Hypochlorite

ClO^1-

Cyanide

CN^1-

Dichromate

Cr₂O₇^2-

Manganate

MnO₄^2-

Hydrogen phosphate

HPO₄^2-

Oxalate

C₂O₄^2-

Peroxide

O₂^2-

Bicarbonate

HCO₃^1-

Hydrogen sulfate

HSO₄^1-

Hydrogen sulfite

HSO₃^1-

Hydroxide

OH^1-

Iodate

IO₃^1-

Sulfate

SO₄^2-

Sulfite

SO₃^2-

Thiosulfate

S₂O₃^2-

Borate

BO₃^3-

Phosphate

PO₄^3-

Iodite

IO₂^1-

Nitrite

NO₂^1-

Mercury

Hg¹⁺

Aluminum

Al³⁺

Phosphite

PO₃^3-

Silicate

SiO₄^4-

Silver

Ag¹⁺

Zinc

Zn²⁺