Homework #10 – Lewis Structures and VSEPR
1. For each of the following atom/ion pairs indicated if the ion is smaller or larger than the
atom.
a. S/S2b. Ca/Ca2+
c. Li/Li2+
2. Draw Lewis structures for the following molecules or ions:
a. H2O
b. PO43c. PCl3
d. SiF4
e. NO2f. N2
g. Cl2
3. Some molecules have Lewis structures that violate the octet rule. Draw a probable Lewis
structure for PCl5.
4. Draw the Lewis structure and using the VSEPR model determine the molecular structure
for each of the molecules below:
a. SF2
b. PCl3
c. SiH4
d. ClO3e. CO2
f. NH4+
5. Draw the Lewis structures an all possible resonance structures for the following
molecules:
a. O3
b. NO3c. CO32d. SO3