Chapter 9 Practice #2 Name ____________________________________

1. Identify the number and kinds of atoms present in a molecule of each compound.

a. Citric acid, C₆H₈O₇

b. Chloroform, CHCl₃

c. Glycine, C₂H₅NO₂

d. Sulfur hexafluoride, SF₆

2. What is the charge on the ion typically formed by each element?

a. Oxygen

b. Iodine

c. Sodium

d. Aluminum

e. Nickel, 2 electrons lost

f. Magnesium

3. How many electrons does the neutral atom gain or lose when each ion forms?

a. Cr³⁺

b. P^3-

c. Li⁺

d. Ca²⁺

e. Cl^-

f. O^2-

4. Name each ion. Identify each as a cation or anion.

a. Sn²⁺

b. Co³⁺

c. Br^-

d. K⁺

e. H^-

f. Mn²⁺

5. Write the formulas for the compounds formed from these pairs of ions.

a. Ba²⁺ , Cl^-

b. Ag⁺ ,I^-

c. Ca²⁺, S^2-

d. K⁺ , Br^-

e. Al ³⁺, O^2-

f. Fe²⁺ , O^2-

6. Write the formulas for these binary ionic compounds.

a. Magnesium oxide

b. Tin (II) fluoride

c. Potassium iodine

d. Aluminum chloride

e. Sodium sulfate

f. Iron (III) bromide

7. Write formulas for compounds formed from these pairs of ions.

a. NH₄⁺, SO₄^2-

b. K⁺, NO₃^-

c. Barium ion and hydroxide ion

d. Lithium ion and carbonate ion

8. Name the following binary ionic compounds.

a. MnO₂

b. Li₃N

c. SrBr₂

d. K₂S

e. CuCl₂

f. SnCl₄

9. Write formulas for the following ternary ionic compounds.

a. sodium phosphate

b. magnesium sulfate

c. sodium hydroxide

d. potassium cyanide

e. ammonium chloride

f. potassium dichromate

10. Name the following compounds.

a. NaCN

b. FeCl₃

c. Na₂SO₄

d. K₂CO₃

e. Cu(OH)₂

f. LiNO₃

11. Name the following molecular compounds.

a. PCl₅

b. CCl₄

c. NO₂

d. XeF₂

e. SiO₂

f. Cl₂O₇

12. Write the formulas for the following binary molecular compounds.

a. nitrogen tribromide

b. dichlorine monoxide

c. sulfur dioxide

d. dinitrogen tetrafluoride

13. Write the formulas for these compounds.

a. aluminum sulfide

b. tin (II) chloride

c. dihydrogen monoxide

d. magnesium oxide

e. ammonium fluoride

f. nitrogen trioxide

g. iron (II) phosphate

h. sulfur hexafluoride

i. magnesium chloride

14. Name the following compounds.

a. K₃PO₄

b. Al(OH)₃

c. NaHSO₄

d. HgO

e. N₂O₅

f. NBr₃

g. PI₃

h. (NH₄)₂SO₄