LEWIS STRUCTURES, GEOMETRY, BONDING PLUS . . .
EXTRA PRACTICE: CHEMICAL BONDING - UNIT 06
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1. To the right is a dot picture of SOF4.
Draw the most stable resonance
structure and state why it is more stable.
What is the electron domain geometry
and the molecular geometry of this
molecule?
2. To the right is a Lewis dot picture of
SO3F−. Draw the most stable resonance
form of this ion and state why it more
stable. What is the electron domain
geometry and the molecular geometry
of this ion?
3. To the right i s a dot pi cture of
S2CNCH3CH3−. Draw two more
resonance structures and rank them
according to their stability. Justify the
reasoning for your order.
4. To the right is a dot picture of SeCN−.
Draw two more resonance structures
and ran k them accordi ng to t heir
stability. Justify the reasoning for your
order.
5. Explain why structure B is a more stable
resonance structure than A for the given
compound.
6. For each of the following species, draw the most stable dot representation. Also, state the steric number, electron domain
geometry, molecular geometry, hybridization of the central atom, and molecular polarity (P or NP). Your work should be
on a separate sheet of paper.
a. S2O42− (no need to give shape or molecular polarity) e. O3
b. H3PO3 f. XeO2F2
c. PH2− g. C2Cl2
d. XeO3 h. SeF4
Answer the following multiple choice by selecting the best answer choice.
7. Which of the following is least likely to violate the octet rule?
8. How many electrons are shown in the Lewis structure of perchlorate ion?
9. As the bond order of a carbon-carbon bond increases, which of the following decreases?
10. Which of the following bonds is most polar?
(a) Be
(b) P
(c) S
(d) B
(e) F
(a) 30
(b) 31
(c) 32
(d) 50
(e) 51
(a) # of e− between C atoms
(b) vibrational frequency of
bond vibrations
(c) bond energy (bond
strength)
(d) bond length
(a) N−Cl
(b) C−N
(c) S−S
(d) Br−Br
(e) S−O
Page of Revised 2018-20191 3
S
O
F
F
F
F
O
S
OO
F
-1
S C
S
N
CH3
CH3
-1
Se C N
-1
CH
O
S
CH
O
S
(A) (B)
B is better because F.C. is
on a more electronegative
element.
See additional sheet with
question 6 answers.
F S
F
F
O
F
No formal charge
on S or O.
O
S
O
O
FOnly one atom with
F. C. (-) FC on most
electroneg element.
S C N
SCH3
CH3SC N
SCH3
CH3
tied for
stability
