Common Polyatomic Ions

Enter the formula of these common polyatomic ions by charge and name.
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tellemknox
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Last updated: September 6, 2025
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First submittedSeptember 6, 2025
Times taken110
Average score70.8%
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Name
Charge
Formula
ammonium
+
NH4
ammonia
0
NH3
acetate
-
C2H3O2
bromate
-
BrO3
chlorate
-
ClO3
chlorite
-
ClO2
cyanide
-
CN
hydrogen carbonate
-
HCO3
hydroxide
-
OH
iodate
-
IO3
nitrate
-
NO3
nitrite
-
NO2
manganate
-
MnO3
thiocyanate
-
SCN
carbonate
2-
CO3
chromate
2-
CrO4
dichromate
2-
Cr2O7
oxalate
2-
C2O4
peroxide
2-
O2
sulfate
2-
SO4
sulfite
2-
SO3
phosphate
3-
PO4
phosphite
3-
PO3
arsenate
3-
AsO4
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