Ch 9 - problem set #2 (due Tuesday, November 28) name:_________________________
Practice writing Lewis Structures for Covalent Compounds (CH101.004)
1. Write the Lewis structure of SF4 (sulfur tetrafluoride).
2. Write the Lewis structure of perchlorate anion (ClO4
-) (note: all Cl,O bonds are the same length).
3. Write the Lewis structure for the radical C2H5 (ethyl radical).
4. Fill in the atom formal charges missing in the structures below. Note: all valence electrons are shown and
the molecules may be charged or neutral. Also note that the C-H bonds have not been written out in order to
simplify the molecular structure drawings.
HC CH
C
CHHC
O C
H
N N H3C CH2H3C CH2H3C CH2
O
N
H2
C
C
H2
H2
C
CH3
H3CCH3
5. Write a Lewis structure for carbon monoxide, CO. There are two resonance structures, one with formal
charges on the atom and one without.
6. Write the Lewis structure for methyl isocyanate, CH3NCO (bonded in that order).
7. Write Lewis structures for 4 isomers with the formula C3H6O. How many isomers exist?
