Common Polyatomic Ions

Question 1

Hg₂²⁺

Answer 1

Mercury(I)

Question 2

NH₄⁺

Answer 2

Ammonium

Question 3

NO₂^-

Answer 3

Nitrite

Question 4

NO₃^-

Answer 4

Nitrate

Question 5

SO₃^2-

Answer 5

Sulfite

Question 6

SO₄^2-

Answer 6

Sulfate

Question 7

HSO₄^-

Answer 7

Hydrogen Sulfate (Bisulfate is a widely used common name)

Question 8

OH^-

Answer 8

Hydroxide

Question 9

CN^-

Answer 9

Cyanide

Question 10

PO₄^3-

Answer 10

Phosphate

Question 11

HPO₄^2-

Answer 11

Hydrogen Phosphate

Question 12

H₂PO₄^-

Answer 12

Dihydrogen Phosphate

Question 13

SCN^-

Answer 13

Thiocyanate

Question 14

CO₃^2-

Answer 14

Carbonate

Question 15

HCO₃^-

Answer 15

Hydrogen Carbonate (Bicarbonate is a widely used common name)

Question 16

ClO^-

Answer 16

Hypochlorite

Question 17

ClO₂^-

Answer 17

Chlorite

Question 18

ClO₃^-

Answer 18

Chlorate

Question 19

ClO₄^-

Answer 19

Perchlorate

Question 20

C₂H₃O₂^-

Answer 20

Acetate

Question 21

MnO₄^-

Answer 21

Permanganate

Question 22

Cr₂O₇^2-

Answer 22

Dichromate

Question 23

CrO₄^2-

Answer 23

Chromate

Question 24

O₂^2-

Answer 24

Peroxide

Question 25

C₂O₄^2-

Answer 25

Oxalate