Drill:
Carbon Monoxide Reading: (10 min)
Read the Carbon Monoxide Reading
and answer the following questions.
1) Why is carbon monoxide so deadly?
2) What about carbon dioxide? Does it
have the same effect?
Objective:
Swbat:
Determine molecular shapes in order to
predict bond angle and polarity by
constructing covalent structures.
SAT Enrichment:
… and … would form a stable
compound.
a.
b.
c.
d.
e.
Sodium … Calcium
Lithium … Potassium
Nitrogen … Krypton
Aluminum …. Cesium
Magnesium … Oxygen
Extension:
Last Class
Oil and Water Extension from last class
Soap Molecule Simulation:
http://intro.bio.umb.edu/111112/111F98Lect/soapandoil.html
Engagement:
Polarity:
“Like Dissolves Like”
(http://www.jce.divched.org/JCESoft/C
CA/pirelli/pages/cca2like.html)
Covalent Structures
How to determine the
structure of a compound.
Class work Exploration:
Covalent Structure worksheet!
Explanation:
Molecular Model Pre-Lab!
Summary
Did we accomplish the objective? Explain.
How can you determine the structure of a
compound using the NASL method?
What criteria would you assess to
determine the polarity of a compound by
knowing its structure?
Homework:
Instructional Fair pages 41 and 42
Drill:
Draw the Lewis dot structure of the
following compounds and determine their
polarity:
1) CCl4
2) AlCl3
Objective:
Swbat:
Determine molecular shapes in order to
predict bond angle and polarity by
constructing covalent structures.
SAT Enrichment:
The forces of attraction that hold crystal
together are called…
a.
b.
c.
d.
e.
Ionic
London dispersion
Covalent
Electrovalent
Metallic
Explanation
Molecular Model Lab
Exploration:
VESPR –Theory
Teacher: (construct sample models for
each shape (linear, bent, trigonal planar,
trigonal pyramidal, tetrahedral).
Molecules are three dimensional and the
electrons spread out to minimize their
interactions (like charges repel).
Once the Lewis structure is drawn, it is
possible to use the VSEPR Theory to
predict the molecule’s shape.
Exploration:
If the molecule is symmetrical along
each axis, it is nonpolar.
If the molecule is asymmetrical along
any of those axes, it is polar.
VESPR-Theory
Complete the worksheet:
Summary:
Did we accomplish the objective?
Explain.
Identify the three types of
hybridization and the types of
bonds associated with them.
What criteria would you assess to
determine the bond angle of a
compound using the
hybridization?
Homework:
Out Spot:
Read the “Out Spot” worksheet and
answer the hw question.
This homework assignment is an
individual assignment.
If two homework answers are the same
it will be assumed that you cheated.
Exit ticket: Covalent Structure