38 terms

Common Polyatomic Ions

Learn the formula and names of polyatomic ions.
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ammonium ion
NH₄ ⁺
acetate ion
C₂H₃O₂ ⁻
hydroxide ion
OH -
hypochlorite ion
ClO ⁻
chlorite ion
ClO₂ ⁻
chlorate ion
ClO₃ ⁻
perchlorate ion
ClO₄ ⁻
nitrite ion
NO₂ ⁻
nitrate ion
NO₃ ⁻
permanganate ion
MnO₄ ⁻
cyanide ion
CN ⁻
silicate ion
SiO₃ ²⁻
thiosulfate ion
S₂O₃ ²⁻
hydride ion
H ⁻
carbonate ion
CO₃ ²⁻
hydrogencarbonate ion
HCO₃ ⁻
chromate ion
CrO₄ ²⁻
dichromate ion
Cr₂O₇ ²⁻
phosphate ion
PO₄ ³⁻
hydrogenphosphate ion
HPO₄ ²⁻
dihydrogenphosphate ion
H₂PO₄ ⁻
phosphite ion
PO₃ ³⁻
sulfate ion
SO₄ ²⁻
sulfite ion
SO₃ ²⁻
hydrogensulfate ion
HSO₄ ⁻
cyanate ion
OCN ⁻
thiocyanate ion
SCN ⁻
oxalate ion
C₂O₄ ²⁻
arsenate ion
AsO₄ ³⁻
peroxide ion
O₂ ²⁻
hypoiodite ion
IO ⁻
iodite ion
IO₂ ⁻
iodate ion
IO₃ ⁻
periodate ion
IO₄ ⁻
hypobromite ion
BrO ⁻
bromite ion
BrO₂ ⁻
bromate ion
BrO₃ ⁻
perbromate ion
BrO₄ ⁻