22_General Chemistry Quiz 5 Chemical Bonding

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Chapter 8 Chemistry
Name _____________________
Chemical Bonding Quiz
1.
State the octet rule:
2.
Which ionic compound consists of a more tightly packed lattice, KCl or CaF2?
Explain.
3.
Nitrogen, N2, is a diatomic gas with exceptionally low reactivity. Explain.
Difference in
Electronegativity
> 1.7
0.4 > 1.7
< 0.4
Type of Bond
Example
ionic
polar covalent
nonpolar
covalent
Na-Cl
C-Cl
H-H
C-H
Electronegativity
Difference
2.1
0.5
0
0.4
More Positive
Atom
Na
C
Neither
Neither
4.
Use the electronegativity data provided to identify the type of bonds below as either
ionic, polar covalent, or nonpolar covalent:
A. O-H
B. Cl-Cl
C. Na-F
D. N-H
E. Ca-O
5.
A. Draw Lewis symbols for atoms of C, N, O, and F
B. Draw Lewis structures for molecules of methane, CH4, ammonia, NH3, water,
H2O, and hydrogen fluoride, HF.
methane
ammonia
water
hydrogen fluoride
6.
Draw a possible Lewis structure for the carbonate ion, CO3-2, and determine the
formal charge on each atom in the ion. (Remember the brackets around the ion.)
7.
A. Three equivalent resonance structures can be drawn for a molecule of sulfur
trioxide, SO3. Draw them, please.
B. Draw the Lewis structure for the sulfite ion, SO3-2, right.
C. Which is predicted to have the shorter sulfur-oxygen bonds? SO3 or SO3-2?
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