Common Polyatomic Ions

Question 1

Name this ion

NH₄⁺

Answer 1

ammonium

Question 2

Name this ion

CN^-

Answer 2

cyanide

Question 3

Name this ion

CH₃CO₂^-

Answer 3

acetate

Question 4

Name this ion

CO₃^2-

Answer 4

carbonate

Question 5

Name this ion

HCO₃^-

Answer 5

hydrogen carbonate (bicarbonate)

Question 6

Name this ion

C₂O₄^2-

Answer 6

oxalate

Question 7

Name this ion

NO₂^-

Answer 7

nitrite

Question 8

Name this ion

NO₃^-

Answer 8

nitrate

Question 9

Name this ion

PO₄^3-

Answer 9

phosphate

Question 10

Name this ion

HPO₄^2-

Answer 10

hydrogen phosphate

Question 11

Name this ion

H₂PO₄^-

Answer 11

dihydrogen phosphate

Question 12

Name this ion

OH^-

Answer 12

hydroxide

Question 13

Name this ion

SO₃^2-

Answer 13

sulfite

Question 14

Name this ion

SO₄^2-

Answer 14

sulfate

Question 15

Name this ion

HSO₄^-

Answer 15

hydrogen sulfate (bisulfate)

Question 16

Name this ion

ClO^-

Answer 16

hypochlorite

Question 17

Name this ion

ClO₂^-

Answer 17

chlorite

Question 18

Name this ion

ClO₃^-

Answer 18

chlorate

Question 19

Name this ion

ClO₄^-

Answer 19

perchlorate

Question 20

Name this ion

CrO₄^2-

Answer 20

chromate

Question 21

Name this ion

Cr₂O₇^2-

Answer 21

dichromate

Question 22

Name this ion

MnO₄^-

Answer 22

permanganate

Question 23

ammonium

Answer 23

NH₄⁺

Question 24

cyanide

Answer 24

CN^-

Question 25

acetate

Answer 25

CH₃CO₂^-

Question 26

carbonate

Answer 26

CO₃^2-

Question 27

hydrogen carbonate (bicarbonate)

Answer 27

HCO₃^-

Question 28

oxalate

Answer 28

C₂O₄^2-

Question 29

nitrite

Answer 29

NO₂^-

Question 30

nitrate

Answer 30

NO₃^-

Question 31

phosphate

Answer 31

PO₄^3-

Question 32

hydrogen phosphate

Answer 32

HPO₄^2-

Question 33

dihydrogen phosphate

Answer 33

H₂PO₄^-

Question 34

hydroxide

Answer 34

OH^-

Question 35

sulfite

Answer 35

SO₃^2-

Question 36

sulfate

Answer 36

SO₄^2-

Question 37

hydrogen sulfate (bisulfate)

Answer 37

HSO₄^-

Question 38

hypochlorite

Answer 38

ClO^-

Question 39

chlorite

Answer 39

ClO₂^-

Question 40

chlorate

Answer 40

ClO₃^-

Question 41

perchlorate

Answer 41

ClO₄^-

Question 42

chromate

Answer 42

CrO₄^2-

Question 43

dichromate

Answer 43

Cr₂O₇^2-

Question 44

permanganate

Answer 44

MnO₄^-