Polyatomic ions

Question 1

ammonium ion

Answer 1

NH4 +

Question 2

mercury(I) ion

Answer 2

Hg2 2+

Question 3

Acetate ion

Answer 3

C2H3O2 - Or CH3CO2

Question 4

Chlorite ion

Answer 4

ClO2 -

Question 5

Hydroxide ion

Answer 5

OH -

Question 6

Nitrate ion

Answer 6

NO3 -

Question 7

Perchlorate ion

Answer 7

ClO4 -

Question 8

Chlorate ion

Answer 8

ClO3 -

Question 9

Cyanide ion

Answer 9

CN -

Question 10

Hypochlorite ion

Answer 10

ClO -

Question 11

Nitrite ion

Answer 11

NO2 -

Question 12

Permanganate ion

Answer 12

MnO4 -

Question 13

Carbonate ion

Answer 13

CO3 2-

Question 14

Oxalate ion

Answer 14

C2O4 2-

Question 15

Sulfite ion

Answer 15

SO3 2-

Question 16

Chromate ion

Answer 16

CrO4 2-

Question 17

Sulfate ion

Answer 17

SO4 2-

Question 18

Thiosulfate ion

Answer 18

S2O3 2-

Question 19

Arsenate ion

Answer 19

AsO4 3-

Question 20

Phosphate ion

Answer 20

PO4 3-

Question 21

If the element has another oxyanion with one less oxygen then the -ate form, what does the suffix change to?

Answer 21

Change the suffix from -ate to -ite.

Question 22

If the element has another oxyanion with one less oxygen then the -ite form, what happens?

Answer 22

The prefix hypo- is added

Question 23

If the element has another oxyanion with one MORE oxygen then the -ate form, what happens?

Answer 23

The prefix per- is added