'Common Polyatomic Ions' Chemistry Chart
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1Common Polyatomic Ions
Name(s)
Formula
Name(s)
Formula
+
-
ammonium
NH
iodate
IO
4
3
-
-
acetate
CH
COO
nitrate
NO
3
3
-
C
H
O
2
3
2
-
nitrite
NO
2
-
bromate
BrO
3
2-
oxalate
C
O
2
4
2-
carbonate
CO
3
-
perchlorate
ClO
4
-
chlorate
ClO
3
-
periodate
IO
4
-
chlorite
ClO
2
-
permanganate
MnO
4
2-
chromate
CrO
4
2-
peroxide
O
2
-
cyanide
CN
3-
phosphate
PO
4
2-
dichromate
Cr
O
2
7
3-
phosphite
PO
3
hydrogen carbonate
-
4-
bicarbonate
HCO
silicate
SiO
3
4
2-
hydrogen sulfate
sulfate
SO
4
-
bisulfate
HSO
4
2-
sulfite
SO
3
hydrogen phosphate
2-
-
biphosphate
HPO
thiocyanate
SCN
4
-
2-
hydroxide
OH
thiosulfate
S
O
2
3
-
hypochlorite
ClO
Other Ions
+
copper (I)
cuprous
Cu
2+
copper (II)
cupric
Cu
2+
iron (II)
ferrous
Fe
3+
iron (III)
ferric
Fe
2+
lead (II)
plumbous
Pb
4+
lead (IV)
plumbic
Pb
2+
mercury (I)
mercurous
Hg
2
2+
mercury (II)
mercuric
Hg
2+
tin (II)
stannous
Sn
4+
tin (IV)
stannic
Sn
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