Polyatomic Ions Chart

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POLYATOMIC IONS
NAME
SYMBOL/CHARGE
+
ammonium
NH
4
-
-
acetate
C
H
O
or CH
COO
2
3
2
3
-
bromate
BrO
3
-
chlorate
ClO
3
-
chlorite
ClO
2
-
cyanide
CN
-
dihydrogen phosphate
H
PO
2
4
-
hypochlorite
ClO
-
hydrogen carbonate
HCO
3
(bicarbonate)
-
hydrogen Sulfate (bisulfate)
HSO
4
-
hydrogen Sulfite (bisulfite)
HSO
3
-
hydroxide
OH
-
iodate
IO
3
-
nitrate
NO
3
-
nitrite
NO
2
-
perchlorate
ClO
4
-
permanganate
MnO
4
-
thiocyanate
SCN
2-
carbonate
CO
3
2-
chromate
CrO
4
2-
dichromate
Cr
O
2
7
2-
oxalate
C
O
2
4
2-
selenate
SeO
4
2-
silicate
SiO
3
2-
sulfate
SO
4
2-
sulfite
SO
3
3-
phosphate
PO
4
3-
phosphite
PO
3

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