NYOS Secondary School Name______

Pre-AP Chemistry

Quarter 2 Exam 1 Review

1) Assume you have a magnesium cation and a nitrate anion combining to make a compound. Answer the following:

a. what type of compound is formed (e.g., ionic, metallic or covalent)?

b. what type of bond is formed between the cation and anion?

c. what is the name of the compound?

d. what is the formula for this compound?

e. do you think this compound should have a high melting point or a low melting point? Explain.

2) In the pairs listed below, select the compound expected to have the highest melting point and explain the rationale for your choice.

a. LiF or LiI

b. LiF or CsF

c. BeO or MgS

d. Li2O or LiF

e. the ionic compound formed from Al and O or that formed from Ag and N

3) What is the name and formula for the ionic compound formed between:

a. Ag cation and thiosulfate

b. Zn cation and peroxide

c. Al cation and bromate

d. Ca cation and hypochlorite

e. K cation and sulfite

4) Correct the names:

a. SO3 sulfur (III) oxide ______

b. FeSO4 iron monosulfoxide ______

c. ZnI2 zinc (II) diiodide ______

5) Answer the following regarding SO2:

a. what is the name? ______

b. what type of compound is this? ______

c. draw the Lewis structure including formal charges

d. what is the shape of the molecule? ______

6) Nitrate and nitrite sound similar but are very different. Draw the Lewis structures (including formal charges) and list the molecular geometries (shapes) for each:

nitrate nitrite

7) Answer the following for this molecule: BF3

a. what is the name?

b. what type of bonding is predicted between and B and F? (i.e., ionic, metallic, or covalent)

c. Draw a Lewis structure including formal charges

d. what is the molecular shape?

e. are the bonds polar or non-polar? Explain

8) What is the difference between a molecular solid and a network solid? Give an example of each.

9) True or false? You can have a single molecule of sodium chloride. Explain.

10) What is the formal charge for each atom in the structure below and what is the overall charge? What is the shape of the molecule?

11) List the common alkane name, the official name, and the chemical formula for the alkane whose line angle drawing is shown below.

12) Draw a picture showing overlap of p orbitals to form a) a sigma bond and, b) a pi bond.

13) A molecule of styrene (the monomer used to make Styrofoam) is shown below. Fill in the table below with the correct number of sigma, pi, single and double bonds for the molecule of styrene.

Number of sigma bonds ______

Nubmer of pi bonds ______

Number of single bonds ______

Number of pi bonds ______

14) Write a Lewis structure for the following organic molecule (make sure to include lone pairs on the oxygen atoms as needed).

CH3CH2COOH

15) Explain using Lewis dot structures why carbon likes to form four covalent bonds and oxygen likes to form two covalent bonds.

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