Polyatomic Ions to Memorize

Question 1

Mercury (I)

Answer 1

Hg₂²⁺

Question 2

Ammonium

Answer 2

NH₄⁺

Question 3

Cyanide

Answer 3

CN^-

Question 4

Carbonate

Answer 4

CO₃^2-

Question 5

Acetate

Answer 5

C₂H₃O₂^-

Question 6

Oxalate

Answer 6

C₂O₄^2-

Question 7

Phosphate

Answer 7

PO₄^3-

Question 8

Sulfite

Answer 8

SO₃^2-

Question 9

Hypochlorite

Answer 9

ClO^-

Question 10

Chlorite

Answer 10

ClO₂^-

Question 11

Chlorate

Answer 11

ClO₃^-

Question 12

Perchlorate

Answer 12

ClO₄^-

Question 13

Chromate

Answer 13

CrO₄^2-

Question 14

Dichromate

Answer 14

Cr₂O₇^2-

Question 15

Hydrogen carbonate

Answer 15

HCO₃^-

Question 16

Permanganate

Answer 16

MnO₄^-

Question 17

Nitrite

Answer 17

NO₂^-

Question 18

Nitrate

Answer 18

NO₃^-

Question 19

Hydroxide

Answer 19

OH^-

Question 20

Peroxide

Answer 20

O₂^2-

Question 21

Monohydrogen phosphate

Answer 21

HPO₄^2-

Question 22

Dihydrogen phosphate

Answer 22

H₂PO₄^-

Question 23

Sulfate

Answer 23

SO₄^2-

Question 24

Hydrogen sulfite

Answer 24

HSO₃^-

Question 25

Hydrogen sulfate

Answer 25

HSO₄^-

Question 26

Thiosulfate

Answer 26

S₂O₃^2-

Question 27

Hydronium

Answer 27

H₃O⁺