3rd Quarter Target Review Name:

Target 1: I can differentiate between ionic compounds and molecular compounds.

1. Determine if each compound is ionic or molecular.

a. N2O b. NH4OH c. Na2O d. SO3

Target 2 and 3: I can write formulas and names for ionic and molecular compounds.

2. For each formula/name pair, determine which is incorrect and then give the correct answer.

Chemical formula / Chemical name / Error / Correction
NaCl / Sodium monochlorine
H2O / Monohydrogen dioxygen
CuCl3 / Copper II chloride
PbCO3 / Lead carbonate
Mg(NO3)2 / Magnesium dinitrate
P3PO4 / Potassium phosphate

Target 4 and 5: I can draw Lewis dot structures (structural formulas) for elements and molecular compounds.

3. Draw Lewis dot structures for the following examples.

a. nitrogen b. CO2 c. C2H4

Target 6: I can identify common ion charges (oxidation numbers).

4. Give the common ion charge for each example.

a. group 3 b. alkali metals c. the halogens

d. the noble gases e. alkaline earth metals f. oxygen family

g. nitrogen family

Target 7: I can identify the physical properties for ionic compounds, polar compounds, and nonpolar molecular compounds.

5. Fill in the chart.

Property / Ionic compound / Polar molecular compound / Nonpolar molecular compound
Melting point
Conductive when dissolved?
Soluble in…
Charges (if any)

Target 8: I can identify the shape and bond angle for a molecule.

6. Draw the structure for each molecule, determine the shape, the bond angle, and if the molecule is polar or nonpolar.

a. PHI2 b. CH2O c. CO2

d. CF4 e. H2S

7. Draw the C3H6O molecule and find the shapes around the central atom and how many unshared pairs in the entire molecule.

Target 9: I can differentiate between ionic, polar, and nonpolar bonds by using the electronegativites of the elements.

8. Fill in the chart. (“EN” stands for electronegativity.)

Pairs / Difference in EN / Type of bond
sodium and fluorine
oxygen and oxygen
nitrogen and hydrogen
EN1= 0.82 EN2= 3.16

Use Figure 1 to answer questions 9-17.

Figure 1

A B C D

(Pair 1) (Pair 2)

9. Which letters (A, B, C, D) represent atoms of the same element?

10. Which letter(s) represent atom(s) that will lose electrons?

11. What type of element(s) will your answer in # 10 be? (metal, nonmetal, semimetal)

12. What type of bond is represented in Pair 1?

13. What type of bond is represented in Pair 2?

14. Would any of the atoms above form an anion? Form a cation?

15. Which pair would show a transfer of electrons?

16. Solvent W is polar and Solvent X is nonpolar. Use this information to answer the following questions:

a. If a compound contained only bonds like the one represented in Pair 1, which solvent will it dissolve in?

b. If a compound contained only bonds like the one represented in Pair 2, which solvent will it dissolve in?

c. Which pair would break apart when it dissolves?

17. Compound Y contains only bonds represented by pair 1. Compound Z contains only bonds represented by pair 2. Use this information to answer the following questions:

a. Which compound has a higher melting point?

b. Which compound when dissolved in a solvent, will conduct electricity?