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Polyatomic Ions

All numbers are subscript
Quiz by
pkaras
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Last updated: February 19, 2026
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First submittedFebruary 17, 2026
Times taken39
Average score52.5%
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Formula
Name (1- Charge)
N3
azide
CN
cyanide
OH
hydroxide
C2H3O2
acetate
HCO3
bicarbonate (hydrogen carbonate)
HSO4
bisulfate (hydrogen sulfate)
HSO3
bisulfite (hydrogen bisulfite)
H2PO4
dihydrogen phosphate
NO3
nitrate
NO2
nitrite
MnO4
permanganate
SCN
thiocyanate
ClO
hypochlorite
ClO2
chlorite
ClO3
chlorate
ClO4
perchlorate
BrO
hypobromite
BrO2
bromite
BrO3
bromate
BrO4
perbromate
IO
hypoiodite
IO2
iodite
IO3
iodate
IO4
periodate
Formula
Name (2- Charge)
CO3
carbonate
CrO4
chromate
Cr2O7
dichromate
HPO4
biphosphate (hydrogen phosphate)
C2O4
oxalate
O2
peroxide
SiO3
silicate
SeO4
selenate
SeO3
selenite
SO4
sulfate
SO3
sulfite
Formula
Name (3- Charge)
AsO4
arsenate
AsO3
arsenite
PO4
phosphate
PO3
phosphite
Formula
Name (1+ Charge)
NH4
ammonium
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