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Common Polyatomic Ions: Formulas And Charges

Enter the Formulas for some common Polyatomic Ions.
Most of the charges are negative.
click on any blank to move the yellow box there
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johndykstra
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Last updated: October 22, 2025
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First submittedOctober 22, 2025
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Average score76.0%
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Polyatomic Ion
Formula
Charge
Chromate
CrO₄
2-
Hydrogen Sulfite
HSO₃
1-
Carbonate
CO₃
2-
Hydrogen Sulfate
HSO₄
1-
Dihydrogen Phosphate
H₂PO₄
1-
Nitrite
NO₂
1-
Phosphite
PO₃
3-
Sulfite
SO₃
2-
Nitrate
NO₃
1-
Cyanide
CN
1-
Oxalate
C₂O₄
2-
Permanganate
MnO₄
1-
Chlorite
ClO₂
1-
Polyatomic Ion
Formula
Charge
Hydrogen Phosphate
HPO₄
2-
Perchlorate
ClO₄
1-
Sulfate
SO₄
2-
Hydrogen Carbonate
HCO₃
1-
Ammonium
NH₄
1+
Acetate
C₂H₃O₂
1-
Phosphate
PO₄
3-
Hydroxide
OH
1-
Silicate
SiO₃
2-
Hypochlorite
ClO
1-
Chlorate
ClO₃
1-
Dichromate
Cr₂O₇
2-
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2 Comments
+1
Level 30
Oct 22, 2025
The mistakes will be fixed, thank you for pointing them out :)
+1
Level 34
Mar 5, 2026
I like your quiz