Connect the Dots
Lewis Dot Symbols
Thursday, December 1, 11
Chem Catalyst
These diagrams are called Lewis Dot Symbols:
1. What is the relationship between the number
of dots, the number of valence electrons, and
the HONC 1234 rule?
2. Create a Lewis Dot symbol for fluorine. How
many bonds will fluorine make?
Thursday, December 1, 11
Activity
Print and tape instructions on the left
Answers on the right (except for boxes)
Work in pencil
Print and cut out the puzzle pieces
Complete the activity
Thursday, December 1, 11
Discussion
You should have three isomers of C3H8O.
(#4) If you have more, check for versions
that are flipped or rotated, but not rearranged. If you have fewer, try to make a
total of three.
Thursday, December 1, 11
Notes
Lewis Dot Structures: A type of structural
formula drawn using Lewis dot symbols (which
show valence electrons). Lines have been
replaced by pairs of dots.
Lewis dot structures show the sharing of pairs
of electrons in covalent bonds.
Covalent Bond: The sharing of a pair of
electrons between two nonmetal atoms.
Thursday, December 1, 11
Consider
Which electrons on an atom are involved
with bonding?
Which electrons on an atom are not involved
with bonding?
Thursday, December 1, 11
Text
Thursday, December 1, 11
Notes
Bonded Pair: A pair of electrons
shared in a covalent bond between
two atoms.
Lone Pair: A pair of electrons not
involved in bonding within a molecule.
The two electrons belong to one atom.
Thursday, December 1, 11
Check-In
The molecular formula C4H10O has
seven different isomers. Draw a
Lewis dot structure of one of
them.
Thursday, December 1, 11
Homework
Lesson 4: Connect the Dots
Pages 160-163
Exercises #1-8
Thursday, December 1, 11