1. According to the HONC Rule, how many covalent bonds form around nitrogen?
1. ? one
2. ? two
3. ? three
4. ? four
5.
2. Which of the following is an acceptable Lewis Structure for the diatomic nitrogen
molecule?
1.
?
2.
?
3.
?
4. ?
5.
3. In the correct Lewis structure for the methane (CH4) molecule, how many
unshared electron pairs surround the carbon?
1. ? 0
2. ? 4
3. ? 2
4. ? 8
5.
4. In the correct Lewis structure for water, how many unshared pairs of electrons
will oxygen have?
1. ? 3
2. ? 4
3. ? 1
4. ? 2
5.
5. Which of the following is an acceptable Lewis structure for chloromethane
(CH3Cl)?
1.
?
1
6.
7.
8.
9.
2.
?
3.
?
4. ?
5.
When compared to single bonds, double bonds are generally:
1. ? longer and stronger
2. ? shorter and weaker
3. ? longer and weaker
4. ? shorter and stronger
5.
Which of the diatomic elements has a double bond between its atoms?
1. ? nitrogen
2. ? flourine
3. ? oxygen
4. ? hydrogen
5.
The seven elements that occur as diatomic elements are:
1. ? H2, N2, O2, F2, Cl2, Br2, I2
2. ? H2, N2, O2, He2, Ne2, Cl2, Br2
3. ? H2, N2, O2, He2, Ne2, C2, Na2
4. ? Fe2, Rn2, O2, He2, Ne2, C2, Br2
5.
In a diatomic molecule of an element, the bond between the atoms must be:
1. ? metallic
2. ? polar covalent
3. ? nonpolar covalent
4. ? ionic
2
10. In the ionic compound magnesium fluoride, what is the ratio of the two elements
necessary so that each element obtains its octet from the transfer of electrons?
1. ? 1 magnesium : 1 fluorine
2. ? 1 magnesium : 2 fluorine
3. ? 2 magnesium : 1 fluorine
4. ? 3 magnesium : 1 fluorine
5.
11. How many sodium atoms are needed to provide the electrons necessary to
complete the valence octet of an oxygen atom?
1. ? four sodium atoms
2. ? one sodium atom
3. ? two sodium atoms
4. ? three sodium atoms
5.
12. In the sodium chloride crystal lattice, each positively charged ion is surrounded
by how many ions of opposite charge?
1. ? 8
2. ? 6
3. ? 2
4. ? 4
5.
13. Ionic compounds generally form:
1. ? gases
2. ? liquids
3. ? crystals
4. ? molecules
3