Polyatomic Ions

Question 1

Ammonium

Answer 1

NH4

Charge: +1

Question 2

Mercury (I)

Answer 2

Hg2

Charge: +2

Question 3

Mercury (II)

Answer 3

Hg

Charge: +2

Question 4

Acetate

Answer 4

C2H3O2

Charge: -1

Question 5

Perchlorate

Answer 5

ClO4

Charge: -1

Question 6

Chlorate

Answer 6

ClO3

Charge: -1

Question 7

Chlorite

Answer 7

ClO2

Charge: -1

Question 8

Hypochlorite

Answer 8

ClO

Charge: -1

Question 9

Cyanide

Answer 9

CN

Charge: -1

Question 10

Hydroxide

Answer 10

OH

Charge: -1

Question 11

Nitrate

Answer 11

NO3

Charge: -1

Question 12

Nitrite

Answer 12

NO2

Charge: -1

Question 13

Permangate

Answer 13

MnO4

Charge: -1

Question 14

Hydrogen Carbonate

Answer 14

HCO3

Charge: -1

Question 15

Carbonate

Answer 15

CO3

Charge: -2

Question 16

Chromate

Answer 16

CrO4

Charge: -2

Question 17

Dichromate

Answer 17

Cr2O7

Charge: -2

Question 18

Oxalate

Answer 18

C2O4

Charge: -2

Question 19

Peroxide

Answer 19

O2

Charge: -2

Question 20

Sulfate

Answer 20

SO4

Charge: -2

Question 21

Sulfite

Answer 21

SO3

Charge: -2

Question 22

Phosphate

Answer 22

PO4

Charge: -3

Question 23

Phosphite

Answer 23

PO3

Charge: -3

Question 24

Slivka’s Square Elements

Answer 24

3x3 beginning with Si, P, S

Question 25

Slivka’s Square Polyatomic Ions rules

Answer 25

1. All of these elements’ are accompanied by 4 Os as -ate ions, and 3 Os as -ite ions
2. Their charges are determined by the column their in as oxidation states
3. All other elements outside of the square have 3 Os as -ate ions, and 2 Os as -ite ions

Question 26

Exceptions to Slivka’s Square

Answer 26

Nitrate: NO3 Charge: -1
Carbonate: CO3 Charge: -2

Question 27

Charges on the Periodic Table

Answer 27

+1, +2, +3, …, -3, -2, -1

Question 28

per- prefix

Answer 28

the polyatomic ion has an extra oxygen atom than the -ate ion

Question 29

hypo- prefix

Answer 29

the polyatomic ion has two fewer oxygen atoms than the -ate ion, and one fewer than the -ite ion