Common Polyatomic Ions

Question 1

Acetate

Answer 1

C ₂H ₃O⁻ ₂

Question 2

Ammonium

Answer 2

NH₄⁺

Question 3

Arsenate

Answer 3

AsO₄³⁻

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

CIO3-

Question 11

Chlorite

Answer 11

CIO2-

Question 12

Chromate

Answer 12

CrO4^2-

Question 13

Cyanide

Answer 13

CN-

Question 14

Dichromate

Answer 14

Cr2O7^2-

Question 15

Dihydrogen phosphate

Answer 15

H2PO4-

Question 16

Dihydrogen phosphite

Answer 16

H2PO3-

Question 17

Hydrogen carbonate

Answer 17

HCO3-

Question 18

Hydrogen phosphate

Answer 18

HPO4^2-

Question 19

Hydrogen phosphite

Answer 19

HPO3^2-

Question 20

Hydrogen sulfate

Answer 20

HSO4-

Question 21

Hydrogen sulfide

Answer 21

HS-

Question 22

Hydrogen sulfite

Answer 22

HSO3-

Question 23

Hydroxide

Answer 23

OH-

Question 24

Hypochlorite

Answer 24

CIO-

Question 25

Iodate

Answer 25

IO3-

Question 26

Manganate

Answer 26

MnO4^2-

Question 27

Nitrate

Answer 27

NO3-

Question 28

Nitrite

Answer 28

NO2-

Question 29

Oxalate

Answer 29

C2O4^2-

Question 30

Perchlorate

Answer 30

CIO4-

Question 31

Permanganate

Answer 31

MnO4-

Question 32

Peroxide

Answer 32

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-