Question of the Week 13 (Lewis Structures)
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1. Complete the following table. Read the instructions!!
Lewis Structure
Draw the 3-D shape (molecular
geometry) and name both the
Identify the total number of
valence electrons and draw electron and molecular geometry.
the electron dot structures.
Draw resonance structures if
appropriate.
a. AsF3
Number of Valence e- = ___
Is this species polar, non-polar
or an ion? Explain. Identify all
of the IFA(s) present unless the
species is an ion.
Electron Geometry
_________________________
Molecular Geometry
_________________________
b. NO2Number of Valence e- = ___
Electron Geometry
_________________________
Molecular Geometry
_________________________
c. CHF3
Number of Valence e- = ___
Electron Geometry
_________________________
Molecular Geometry
_________________________
d. NH3
Number of Valence e- = ___
Electron Geometry
_________________________
Molecular Geometry
_________________________
AP Chemistry 2006 (Baverstock)
26
Lewis Structure
Identify the total number of
valence electrons and draw
the electron dot structures.
Draw the 3-D shape (molecular
geometry) and name both the
electron and molecular geometry.
Draw resonance structures if
appropriate.
Is this species polar, nonpolar or an ion? Explain.
Identify all of the IFA(s)
present unless the species
is an ion.
e. BrCl4+
Number of Valence e- = ___
Electron Geometry
_________________________
Molecular Geometry
_________________________
f. XeOCl4
Number of Valence e- = ___
Electron Geometry
_________________________
Molecular Geometry
_________________________
2. a. Draw the structural diagram and electron dot structure for: Propanoic acid. (2)
Structural Diagram
Electron Dot Structure
b.
In your structural diagram number each carbon (from 1 to 3) and oxygen (1 to 2). Name
both the electron geometry and molecular geometry for each. (5)
Atom
Electron Geometry
Molecular Geometry
Carbon 1
Carbon 2
Carbon 3
Oxygen 1
Oxygen 2
3. a. Consider the structural diagram for the following molecule. Complete the electron dot
structure. (1)
Structural Diagram
Electron Dot Structure
O
4
1
NH2
3
2
1
OH
1
b. Name the molecular geometry for each atom numbered in the structural diagram. (5)
Atom
Molecular Geometry
Atom
Molecular Geometry
Carbon 1
Oxygen 1
Carbon 2
Nitrogen 1
Carbon 3
Carbon 4
AP Chemistry 2006 (Baverstock)
27