Common Polyatomic Ions

Question 1

C₂H₃O₂^-

Answer 1

acetate ion

Question 2

CO₃^2-

Answer 2

carbonate ion

Question 3

NH₄⁺

Answer 3

ammonium ion

Question 4

ClO₂^-

Answer 4

chlorate ion

Question 5

CrO₄^2-

Answer 5

chromate ion

Question 6

CN^-

Answer 6

cyanide ion

Question 7

Cr₂O₇^2-

Answer 7

dichromate ion

Question 8

HCO₃^-

Answer 8

hydrogen carbonate ion

Question 9

HSO₄^-

Answer 9

hydrogen sulfate ion

Question 10

OH^-

Answer 10

hydroxide ion

Question 11

ClO^-

Answer 11

hypochlorite ion

Question 12

NO₃^-

Answer 12

nitrate ion

Question 13

NO₂^-

Answer 13

nitrite ion

Question 14

ClO₄^-

Answer 14

perchlorate ion

Question 15

MnO₄^-

Answer 15

permanganate ion

Question 16

PO₄^3-

Answer 16

phosphate ion

Question 17

SO₄²-

Answer 17

sulfate ion

Question 18

SO₃^2-

Answer 18

sulfite ion

Question 19

acetate ion

Answer 19

C₂H₃O₂^-

Question 20

carbonate ion

Answer 20

CO₃^2-

Question 21

ammonium ion

Answer 21

NH₄⁺

Question 22

chlorate ion

Answer 22

ClO₂^-

Question 23

chromate ion

Answer 23

CrO₄^2-

Question 24

cyanide ion

Answer 24

CN^-

Question 25

dichromate ion

Answer 25

Cr₂O₇^2-

Question 26

hydrogen carbonate ion

Answer 26

HCO₃^-

Question 27

hydrogen sulfate ion

Answer 27

HSO₄^-

Question 28

hydroxide ion

Answer 28

OH^-

Question 29

hypochlorite ion

Answer 29

ClO^-

Question 30

nitrate ion

Answer 30

NO₃^-

Question 31

nitrite ion

Answer 31

NO₂^-

Question 32

perchlorate ion

Answer 32

ClO₄^-

Question 33

permanganate ion

Answer 33

MnO₄^-

Question 34

phosphate ion

Answer 34

PO₄^3-

Question 35

sulfate ion

Answer 35

SO₄²-

Question 36

sulfite ion

Answer 36

SO₃^2-