1. WARM UP “Luck may sometimes help; work always helps.”
Do you agree? Why?
How does this apply to school in general, and Chemistry I in specific?

2. Video Clip – Field of Dreams

3. Molecular Geometry

4. Molecular Geometry 3-D picture of atoms in compound
Bond angles
Use Lewis structure around central atom

5. Valence Shell Electron-Pair Repulsion VSEPR
Look around central atom
All bonds equal
Atoms and lone pairs repel
As far apart as possible

6. Molecular Models
Ball-and-stick
Model building
3-D image

7. Molecular Models Drawing Bond directions shown by symbols
Sideways = line
Toward = triangle
Away = dashes

8. Molecule Shapes – No Lone Pairs on Central AtomAB
Linear
AB2

9. Molecule Shapes – No Lone Pairs on Central Atom
AB3
Trigonal planar
AB4
Tetrahedral

10. Molecule Shapes – 1 or More Lone Pairs on Central Atom
ABE
Linear
AB2E
Bent

11. Molecule Shapes – 1 or More Lone Pairs on Central Atom
AB2E2
Bent

12. Molecule Shapes – 1 or More Lone Pairs on Central Atom
AB3E
Trigonal pyramidal

13. WRAP UP
What are the two basic rules you need to follow when creating a geometry model or drawing?

14. WARM UP
“Just keep going – everybody gets better if they keep at it.” – Ted Williams
What does this mean to you?
Do you agree with this? Why?
How can you apply this to Chemistry?

15. WRAP UP What does VSEPR stand for?
What does VSEPR mean, in your own words?

16. WARM UP
Write the name of the geometry of each of the following molecule classes
(remember: A=central atom B=outside atom E=lone pair)
AB2
AB3
AB4
AB2E
AB3E

17. WRAP UP
Write the name of the geometry of each of the following molecules.
SiO2
CH2O
SiBr4
PBr3

18. WARM UP
Write the name of the geometry of each of the following molecule classes
(remember: A=central atom B=outside atom E=lone pair)
AB2
AB3
AB4
AB2E
AB3E

19. Make a geometry drawing of each the following covalent molecules:
WRAP UP
Make a geometry drawing of each the following covalent molecules:
SeCl2 SiO2
PBr3 CH4