1. Do the warm-up on the table and check your
answers (Polyatomic and Acids)
2. Get the home work off of the front table
3. Draw the Lewis Structures for the molecules on the
board on a PIECE OF PAPER (not white boards)
4. Have periodic table, paper, and pencil ready for
lesson
5. Today we will be answering:
“What does the Lewis Structure tell us about the Covalent
molecule”
Homework:
Naming Worksheet
Memorizing Polyatomics
Important Dates:
2/12 Polyatomic quiz
2/24 Covalent Test
FIVE E- GEOMETRY GROUPS:
 2 electron groups – Linear
 3 electron groups – Trigonal Planar
 4 electron groups – Tetrahedral
 5 electron groups – Trigonal bipyramidal
 6 electron groups – Octahedral





Example: CO2
Two e- Groups around central atom
Shape Name: Linear
Angles 180°
sp hybridization


Three e- groups around central atom
Two types of Trigonal Planar groups:
 3 bonding pairs
 2 bonding pairs and 1 lone pair





Example: BH3
Three bonding electron pairs
Shape Name: Trigonal Planar
Angles 120°
sp2 hybridization





Examples: SO2
Two bonding electron pairs, one lone pair
Shape Name: Bent
Angles less than 120°
sp2 hybridization


Four e- groups around central atom
Three types of tetrahedral groups:
Four bonding pairs
 Three bonding pairs, one lone pair
 Two bonding pairs, two lone pairs






Example: CCl4
Four bonding pairs around central atom
Shape Name: Tetrahedral
Angles: 109.5°
sp3 hybridization





Example: PF3
Three bonding pairs, one lone pair
Shape Name: Trigonal Pyramidal
Angles less than 109.5°
sp3 hybridization





Example: H2O
Two bonding pairs, Two lone pairs
Shape Name: Bent
Angles less than 109.5°
sp3 hybridization


Five e- groups around central atom
Four types of Trigonal Bipyramidal
groups:
 Five bonding pairs
 Four bonding pairs, one lone pair
 Thee bonding pairs, two lone pairs
 Two bonding pairs, three lone pairs





Example: PF5
Five bonding pairs
Shape Name: Trigonal Bipyramidal
Angles 90° and 120°
sp3d hybridization





Example: SF4
Four bonding pairs, one lone pair
Shape Name: Seesaw
Angles less than 90° and less than 120°
sp3d hybridization





Example: BrF3
Thee bonding pairs, two lone pairs
Shape Name: T-Shaped
Angles less than 90°
sp3d hybridization





Example: XeF2
Two Bonding pairs, three lone pairs
Shape Name: Linear
Angles 180°
sp3d hybridization


Six e- groups around central atom
Three types of Trigonal Bipyramidal
groups:
 Six bonding pairs
 Five bonding pairs, one lone pair
 Four bonding pairs, two lone pairs





Example: SF6
Six bonding pairs
Shape Name: Octahedral
Angles 90°
sp3d2 hybridization





Example:BrF5
Five Bonding Pairs, One lone pair
Shape Name: Square Pyramidal
Angles less than 90°
sp3d2 hybridization





Example: XeF4
Four bonding pairs, two lone pairs
Shape Name: Square Planar
Angles 90°
sp3d2 hybridization