Bonding Worksheet
1.
Identify what is wrong with each of the following molecules.
14 e-
10 e-
18 e-
HOF:
too many electrons around fluorine
C2 H4 :
too many electrons around hydrogen
too many electrons shown in molecule
CHOF:
too few electrons around the oxygen
carbon shows more electrons than it actually has
carbon doesn’t typically have non-bonded electron pairs
2.
Draw the Lewis structures for the following covalently bonded molecules.
Include ALL valence electrons. For each drawing, include the following
information:
a)
b)
c)
all polar bonds
the direction the net bond dipole moves
the overall shape of the molecule
5+3 = 8
AsH3
5 + 6 + 7 = 18
NOCl
6 + 12 = 18
SO2
4 + 6 + 6 = 16
COS
6 + 14 = 20
OF2
5 + 21 = 26
NBr3
3.
Work on questions 8.97, 98, 99, 100.
Answers are found online on my website.
4.
Three Lewis structures representing HONO2 is shown below.
A
a)
C
Identify the formal charges on each atom in each drawing.
A
O
+1
N
+1
N - O - -1
b)
B
B
O
N
O=N
O-N
0
0
0
-1
C
O
N
O=N
0
0
0
Based on these formal charges, which is the best Lewis structure?
C is the best drawing since all formal charges are zero, representing the
lowest potential energy possible.