Polyatomic Ions

Question 1

ammonium

Answer 1

NH4 +

Question 2

hydronium

Answer 2

H3O +

Question 3

acetate

Answer 3

C2H3O2 - (or CH3COO -)

Question 4

azide

Answer 4

N3 -

Question 5

hydroxide

Answer 5

OH -

Question 6

peroxide

Answer 6

O2 2-

Question 7

carbonate

Answer 7

CO3 2-

Question 8

hydrogencarbonate (bicarbonate)

Answer 8

HCO3 -

Question 9

chromate

Answer 9

CrO4 2-

Question 10

dichromate

Answer 10

Cr2O7 2-

Question 11

cyanide

Answer 11

CN -

Question 12

perbromate

Answer 12

BrO4 -

Question 13

bromate

Answer 13

BrO3 -

Question 14

bromite

Answer 14

BrO2 -

Question 15

hypobromite

Answer 15

BrO -

Question 16

perchlorate

Answer 16

ClO4 -

Question 17

chlorate

Answer 17

ClO3 -

Question 18

chlorite

Answer 18

ClO2 -

Question 19

hypochlorite

Answer 19

ClO -

Question 20

periodate

Answer 20

IO4 -

Question 21

iodate

Answer 21

IO3 -

Question 22

iodite

Answer 22

IO2 -

Question 23

hypoiodite

Answer 23

IO -

Question 24

permanganate

Answer 24

MnO4 -

Question 25

nitrate

Answer 25

NO3 -

Question 26

nitrite

Answer 26

NO2 -

Question 27

sulfate

Answer 27

SO4 2-

Question 28

sulfite

Answer 28

SO3 2-

Question 29

hydrogen sulfate

Answer 29

HSO4 -

Question 30

hydrogen sulfite

Answer 30

HSO3 -

Question 31

phosphate

Answer 31

PO4 3-

Question 32

phosphite

Answer 32

PO3 3-

Question 33

hydrogen phosphate

Answer 33

HPO4 2-

Question 34

dihydrogenphosphate

Answer 34

H2PO4 -

Question 35

hydrogen phosphite

Answer 35

HPO3 2-

Question 36

dihydrogenphosphite

Answer 36

H2PO3 -