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25 Common Polyatomic Ions based on Dr. Sen's Worksheet
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NH₄⁺
Ammonium
H₂PO₄⁻
Dihydrogen phosphate
C₂H₃O₂⁻
Acetate
HSO₃⁻
Hydrogen sulfite
HSO₄⁻
Hydrogen sulfate
HCO₃⁻
Hydrogen carbonate
NO₂⁻
Nitrite
NO₃⁻
Nitrate
CN⁻
Cyanide
OH⁻
Hydroxide
MnO₄⁻
Permanganate
ClO⁻
Hypochlorite
ClO₂⁻
Chlorite
ClO₃⁻
Chlorate
ClO₄⁻
Perchlorate
BrO⁻
Hypobromite
BrO₂⁻
Bromite
BrO₃⁻
Bromate
BrO₄⁻
Perbromate
IO⁻
Hypoiodite
IO₂⁻
Iodite
IO₃⁻
Iodate
IO₄⁻
Periodate
HPO₄²⁻
Hydrogen phosphate
C₂O₄²⁻
Oxalate
SO₃²⁻
Sulfite
SO₄²⁻
Sulfate
CO₃²⁻
Carbonate
CrO₄²⁻
Chromate
Cr₂O₇²⁻
Dichromate
SiO₃²⁻
Silicate
PO₃³⁻
Phosphite
PO₄³⁻
Phosphate