Common Polyatomic Ions

Question 1

acetate

Answer 1

C₂H₃O₂^-

Question 2

ammonium

Answer 2

NH4⁺

Question 3

arsenate

Answer 3

AsO₄^3-

Question 4

arsenite

Answer 4

AsO₃^3-

Question 5

azide

Answer 5

N₃^-

Question 6

benzoate

Answer 6

C₇H₅O₂^-

Question 7

borate

Answer 7

BO₃^3-

Question 8

bromate

Answer 8

BrO₃^-

Question 9

carbonate

Answer 9

CO₃^2-

Question 10

chlorate

Answer 10

ClO₃^-

Question 11

chlorite

Answer 11

ClO₂^-

Question 12

chromate

Answer 12

CrO₄^2-

Question 13

cyanide

Answer 13

CN^-

Question 13

dichromate

Answer 13

Cr₂O₇^2-

Question 13

dihydrogen phosphate

Answer 13

H₂PO₄^-

Question 13

dihydrogen phosphite

Answer 13

H₂PO₃^-

Question 14

hydrogen carbonate

Answer 14

HCO₃^-

Question 14

hydrogen phosphate

Answer 14

HPO₄^2-

Question 14

hydrogen phosphite

Answer 14

HPO₃^2-

Question 14

hydrogen sulfate

Answer 14

HSO₄^2-

Question 14

hydrogen sulfide

Answer 14

HS^-

Question 14

hydrogen sulfite

Answer 14

HSO₃^-

Question 14

hydroxide

Answer 14

OH^-

Question 15

hypochlorite

Answer 15

ClO^-

Question 16

iodate

Answer 16

IO₃^-

Question 17

manganate

Answer 17

MnO₄^2-

Question 21

nitrate

Answer 21

NO₃^-

Question 23

nitrite

Answer 23

NO₂^-

Question 25

oxalate

Answer 25

C₂O₄^2-

Question 27

perchlorate

Answer 27

ClO₄^-

Question 29

permaganate

Answer 29

MnO₄^-

Question 31

peroxide

Answer 31

O₂^2-

Question 33

phosphate

Answer 33

PO₄^3-

Question 34

phosphite

Answer 34

PO₃^3-

Question 35

silicate

Answer 35

SiO₃^2-

Question 36

sulfate

Answer 36

SO₄^2-

Question 37

sulfite

Answer 37

SO₃^2-

Question 38

tartrate

Answer 38

C₄H₄O₆^2-

Question 39

thiocyanate

Answer 39

SCN^-

Question 40

thiosulfate

Answer 40

S₂O₃^2-

Question 41

AsO₃^3-

Answer 41

arsenite

Question 42

AsO₄^3-

Answer 42

arsenate

Question 43

BO₃^3-

Answer 43

borate

Question 44

BrO₃^-

Answer 44

bromate

Question 45

C₂H₃O₂^-

Answer 45

acetate

Question 46

C₂O₄^2-

Answer 46

oxalate

Question 47

C₄H₄O₆^2-

Answer 47

tartrate

Question 48

C₇H₅O₂^-

Answer 48

benzoate

Question 49

ClO^-

Answer 49

hypochlorite

Question 50

ClO₂^-

Answer 50

chlorite

Question 51

ClO₃^-

Answer 51

chlorate

Question 52

ClO₄^-

Answer 52

perchlorate

Question 53

CN^-

Answer 53

cyanide

Question 54

CO₃^2-

Answer 54

carbonate

Question 55

Cr₂O₇^2-

Answer 55

dichromate

Question 56

CrO₄^2-

Answer 56

chromate

Question 57

H₂PO₃^-

Answer 57

dihydrogen phosphite

Question 58

H₂PO₄^-

Answer 58

dihydrogen phosphate

Question 59

HCO₃^-

Answer 59

hydrogen carbonate

Question 60

HPO₃^2-

Answer 60

hydrogen phosphite

Question 61

HPO₄^2-

Answer 61

hydrogen phosphate

Question 62

HS^-

Answer 62

hydrogen sulfide

Question 63

HSO₃^-

Answer 63

hydrogen sulfite

Question 64

HSO₄^2-

Answer 64

hydrogen sulfate

Question 65

IO₃^-

Answer 65

iodate

Question 66

MnO₄^-

Answer 66

permaganate

Question 67

MnO₄^2-

Answer 67

manganate

Question 68

N₃^-

Answer 68

azide

Question 69

NH4⁺

Answer 69

ammonium

Question 70

NO₂^-

Answer 70

nitrite

Question 71

NO₃^-

Answer 71

nitrate

Question 72

O₂^2-

Answer 72

peroxide

Question 73

OH^-

Answer 73

hydroxide

Question 74

PO₃^3-

Answer 74

phosphite

Question 75

PO₄^3-

Answer 75

phosphate

Question 76

S₂O₃^2-

Answer 76

thiosulfate

Question 77

SCN^-

Answer 77

thiocyanate

Question 78

SiO₃^2-

Answer 78

silicate

Question 79

SO₃^2-

Answer 79

sulfite

Question 80

SO₄^2-

Answer 80

sulfate