Polyatomic Ions #2

All numbers are subscript
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pkaras
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Last updated: May 13, 2026
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First submittedMay 12, 2026
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Name
Formula
azide
N3
cyanide
CN
hydroxide
OH
acetate
C2H3O2
bicarbonate (hydrogen carbonate)
HCO3
bisulfate (hydrogen sulfate)
HSO4
bisulfite (hydrogen sulfite)
HSO3
dihydrogen phosphate
H2PO4
nitrate
NO3
nitrite
NO2
permanganate
MnO4
thiocyanate
SCN
hypochlorite
ClO
chlorite
ClO2
chlorate
ClO3
perchlorate
ClO4
hypobromite
BrO
bromite
BrO2
bromate
BrO3
perbromate
BrO4
hypoiodite
IO
iodite
IO2
iodate
IO3
periodate
IO4
Name
Formula
carbonate
CO3
chromate
CrO4
dichromate
Cr2O7
biphosphate (hydrogen phosphate)
HPO4
oxalate
C2O4
peroxide
O2
silicate
SiO3
selenate
SeO4
selenite
SeO3
sulfate
SO4
sulfite
SO3
Name
Formula
arsenate
AsO4
arsenite
AsO3
phosphate
PO4
phosphite
PO3
Name
Formula
ammonium
NH4
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