Polyatomic Ions

Question 1

Ammonium

Answer 1

NH₄⁺

Question 2

Nitrite

Answer 2

NO₂^-

Question 3

Nitrate

Answer 3

NO₃^-

Question 4

Sulfite

Answer 4

SO₃^2-

Question 5

Sulfate

Answer 5

SO₄^2-

Question 6

Hydrogen Sulfate, also called bisulfate

Answer 6

HSO₄^-

Question 7

Hydroxide

Answer 7

OH^-

Question 8

Cyanide

Answer 8

CN^-

Question 9

Phosphate

Answer 9

PO₄^3-

Question 10

Hydrogen Phosphate

Answer 10

HPO₄^2-

Question 11

Dihydrogen Phosphate

Answer 11

H₂PO₄^-

Question 12

Carbonate

Answer 12

CO₃^2-

Question 13

Hydrogen carbonate (bicarbonate)

Answer 13

HCO₃^-

Question 14

Hypochlorite

Answer 14

ClO^-

Question 15

Chlorite

Answer 15

ClO₂^-

Question 16

Chlorate

Answer 16

ClO₃^-

Question 17

Perchlorate

Answer 17

ClO₄^-

Question 18

Acetate

Answer 18

C₂H₃O₂^-

Question 19

Permaganate

Answer 19

MnO₄^-

Question 20

Dichromate

Answer 20

Cr₂O₇^2-

Question 21

Chromate

Answer 21

CrO₄^2-

Question 22

Peroxide

Answer 22

O₂^2-

Question 23

Rules for naming acids

Answer 23

• ate => ic + acid
• ite => ous + acid
• ide => hydro______ic acid

Question 24

Rules for naming simple binary ionic

Answer 24

• The cation is always named first and the anion second.
• Change second element suffix to “-ide”

Question 25

Rules for binary compounds with transition metals

Answer 25

1. roman numerals to specify charge of transition metal
2. Change second element suffix to “ide”

Question 26

Rules for binary covalent compounds

Answer 26

1. The first element in the formula is named first, using the full element name.
2. Second element change suffix to “ide”
3. Prefixes are used to denote the numbers of atoms present.
4. The prefix mono- is never used for naming the first element.