What is the correct shape of CO 2 ? #1: What are bonds made of?
#2: What charge are electrons?
Slide 2
What is the correct shape of CO 2 ? Will those (-) charges
attract or repel? A)AttractB) Repel (Clue: look at 2 balloons)
Slide 3
Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double
bonds = Triple bonds Question: Example: CCl 4 - Bonding Groups =
4
Slide 4
Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double
bonds = Triple bonds 1 bonding group Question: Example: CHOF -
Bonding Groups= 3
Slide 5
Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double
bonds = Triple bonds 1 bonding group Question: Example: CHOF -
Bonding Groups= 2 1 bonding group
Slide 6
Key Pt 1: Bonding Groups Single lone pair= 1 nonbonding group
Two lone pairs= Three lone pairs = Question: Example: AsH 3
-Nonbonding Groups= 1
Slide 7
Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding
group Two lone pairs= Three lone pairs = Question: Example: SHCl
-Nonbonding Groups= 2 nonbonding group 3 nonbonding group 2
Slide 8
Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding
group Two lone pairs= Three lone pairs = Question: Example: SHCl
-Nonbonding Groups= 2 nonbonding group 3 nonbonding group 2
Slide 9
Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding
group Two lone pairs= Three lone pairs = Question: Example: SHCl
-Nonbonding Groups= 2 nonbonding group 3 nonbonding group 0
Slide 10
How many bonding groups are there? A) 3C) 8 B) 4 (Double Bonds
=Just one bonding group)
Slide 11
How many nonbonding groups are there? A) 0C) 5 B) 3
(Nonbonding:Only count around central atom)
Slide 12
How many nonbonding groups are there? A) 0C) 5 B) 3
(Nonbonding:Only count around central atom) 2 3 0
Slide 13
Cut and paste into your notebooks. Question:
Slide 14
alencehelllectronairepulsion spread out as much as possible.
A)AttractB) Repel
Slide 15
alencehelllectronairepulsion spread out as much as possible.
Step 1: Molecule Count # Electron Groups around central atom Step
2: Balloon Spread out as far as possible. Angle? Step 3: Geometry
Determine the shape. 2 bonding groups 180 Linear A)Linear
B)Trigonal Planar C)Trigonal Pyramid D)Tetrahedral
Slide 16
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape:
Slide 17
alencehelllectronairepulsion spread out as much as possible.
Step 1: Molecule Count # Electron Groups around central atom Step
2: Balloon Spread out as far as possible. Angle? Step 3: Geometry
Determine the shape. 3 bonding groups Trigonal Planar A)Linear
B)Trigonal Planar C)Tetrahedral 120
Slide 18
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 3
Slide 19
How will these groups spread out? A) B) C) None of the above
(How many electron groups?4 electron groups) (Balloon demo: what
happens?)
Slide 20
What shape is this most like? (How many corners? A) Triangular
PyramidB) Rectangular Pyramid 4 corners)
Slide 21
What else is this shape called? A) TrihedronC) Tetrahedron B)
Quadrahedron (Mono = 1, Di = 2, Tri = 3, Tetra = 4, Penta = 5)
Slide 22
alencehelllectronairepulsion spread out as much as possible.
Step 1: Molecule Count # Electron Groups around central atom Step
2: Balloon Spread out as far as possible. Angle? Step 3: Geometry
Determine the shape. 4 bonding groups Tetrahe- dral A)Linear
B)Trigonal Planar C)Tetrahedral 109.5
Slide 23
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral
Slide 24
What kind of shape will form? A) Trigonal PlanarC)Tetrahedral
B) Trigonal Pyramidal (Bonding groups =3)
Slide 25
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral
Slide 26
What kind of shape will form? A) Trigonal PlanarC)Tetrahedral
B) Trigonal Pyramidal (Bonding groups =3)
Slide 27
What kind of shape will form? A) Trigonal PlanarC)Tetrahedral
B) Trigonal Pyramidal (Bonding groups =2)
Slide 28
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral
Slide 29
What kind of shape will form? A) TetrahedralC) Linear B)
Straight (Bonding groups =3)
Slide 30
alencehelllectronairepulsion spread out as much as possible.
Step 1: Molecule Count # Electron Groups around central atom Step
2: Balloon Spread out as far as possible. Angle? Step 3: Geometry
Determine the shape. 3 bonding, 1 nonbonding Trigonal Pyramidal
109.5
Slide 31
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal
Slide 32
What will the overall shape of SF 2 be? A) LinearB) Tetrahedral
(Count around central atom only)
Slide 33
How many corners will SF 2 have? A) 2 cornersC) 4 corners B) 3
corners (1 atom = 1 corner)
Slide 34
Remove one more dot from candy tetrahedron. What letter does it
look like now? V-shaped
Slide 35
alencehelllectronairepulsion spread out as much as possible.
Step 1: Molecule Count # Electron Groups around central atom Step
2: Balloon Spread out as far as possible. Angle? Step 3: Geometry
Determine the shape. 2 bonding, 2 nonbonding Bent 109.5
Slide 36
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2
bonding 2 nonbonding Bent
Slide 37
What is the shape of PCl 3 ? A) Trigonal PlanarC) Tetrahedral
B) Trigonal Pyramidal (# Bonding = # Nonbonding = ) 3 1
Slide 38
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2
bonding 2 nonbonding Bent
Slide 39
What is the shape of PCl 3 ? A) Trigonal PlanarC) Tetrahedral
B) Trigonal Pyramidal (# Bonding = # Nonbonding = ) 3 1
Slide 40
What is the shape of SCl 2 ? A) LinearC) Bent B) Tetrahedral (#
Bonding = # Nonbonding = ) 2 2
Slide 41
VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups
stay as far apart as possible. Electron Groups 2 Bonding Groups
Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding
Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2
bonding 2 nonbonding Bent
Slide 42
What is the shape of PCl 3 ? A) LinearC) Bent B) Tetrahedral (#
Bonding = # Nonbonding = ) 2 2