Common Polyatomic Ions

Question 1

CO₃^2-

Answer 1

carbonate

Question 2

Hg₂²⁺

Answer 2

Mercury (I)

Question 3

ClO₃^-

Answer 3

chlorate

Question 4

ClO₄^-

Answer 4

perchlorate

Question 5

dihydrogen phosphate

Answer 5

H₂PO₄^-

Question 6

hydroxide

Answer 6

OH^-

Question 7

chlorate

Answer 7

ClO₃^-

Question 8

ammonium

Answer 8

NH₄⁺

Question 9

NO₂^-

Answer 9

nitrite

Question 10

CN^-

Answer 10

cyanide

Question 11

carbonate

Answer 11

CO₃^2-

Question 12

sulfite

Answer 12

SO₃^2-

Question 13

hydronium

Answer 13

H₃O⁺

Question 14

H₂PO₄^-

Answer 14

dihydrogen phosphate

Question 15

NO₃^-

Answer 15

nitrate

Question 16

hydrogen sulfite

Answer 16

HSO₃^-

Question 17

OH^-

Answer 17

hydroxide

Question 18

C₂H₃O₂^-

Answer 18

acetate

Question 19

CrO₄^2-

Answer 19

chromate

Question 20

NH₄⁺

Answer 20

ammonium

Question 21

phosphite

Answer 21

PO₃^3-

Question 22

PO₃^3-

Answer 22

phosphite

Question 23

HCO₃^-

Answer 23

hydrogen carbonate/bicarbonate

Question 24

sulfate

Answer 24

SO₄^2-

Question 25

cyanide

Answer 25

CN^-

Question 26

hydrogen sulfate/bisulfate

Answer 26

HSO₄^-

Question 27

oxalate

Answer 27

C₂O₄^2-

Question 28

ClO₂^-

Answer 28

chlorite

Question 29

thiocyanate

Answer 29

SCN^-

Question 30

hypochlorite

Answer 30

ClO^-

Question 31

chlorite

Answer 31

ClO₂^-

Question 32

SCN^-

Answer 32

thiocyanate

Question 33

HSO₃^-

Answer 33

hydrogen sulfite

Question 34

Mercury (I)

Answer 34

Hg₂²⁺

Question 35

SO₄^2-

Answer 35

sulfate

Question 36

HSO₄^-

Answer 36

hydrogen sulfate/bisulfate

Question 37

peroxide

Answer 37

O₂^2-

Question 38

ClO^-

Answer 38

hypochlorite

Question 39

Cr₂O₇^2-

Answer 39

dichromate

Question 40

hydrogen phosphate

Answer 40

HPO₄^2-

Question 41

NH₃^-

Answer 41

azide

Question 42

hydrogen carbonate/bicarbonate

Answer 42

HCO₃^-

Question 43

nitrate

Answer 43

NO₃^-

Question 44

MnO₄^-

Answer 44

permagnate

Question 45

dichromate

Answer 45

Cr₂O₇^2-

Question 46

nitrite

Answer 46

NO₂^-

Question 47

PO₄^3-

Answer 47

phosphate

Question 48

acetate

Answer 48

C₂H₃O₂^-

Question 49

SO₃^2-

Answer 49

sulfite

Question 50

chromate

Answer 50

CrO₄^2-

Question 51

azide

Answer 51

NH₃^-

Question 52

perchlorate

Answer 52

ClO₄^-

Question 53

O₂^2-

Answer 53

peroxide

Question 54

HPO₄^2-

Answer 54

hydrogen phosphate

Question 55

H₃O⁺

Answer 55

hydronium

Question 56

C₂O₄^2-

Answer 56

oxalate

Question 57

phosphate

Answer 57

PO₄^3-

Question 58

permagnate

Answer 58

MnO₄^-