Monday, November 5

Monday, November 5

• Take out your “VSEPR Theory” notes and new piece of paper

• Marshmallow lab tomorrow- Thank you Brianna L and Kristi H for donating supplies.

• Test Thursday, November 8!

Tuesday, November 6

• Take out your notes from Chapter 6: Chemical Bonding

• When finished with lab today, begin working on homework questions.

• Reminders:• Ch. 6 Review Homework due tomorrow• Test Thursday, November 8!

Wednesday, November 7

• Take out you Chapter 6 Review homework.

• Reminders:• Test Thursday, November 8!

• Molecular Geometry• Chapter 6 Vocab• Lewis Structures • Notes

Thursday, November 8

• Turn in your Chapter 6 Review homework on front counter.

• When finish test, complete Ch. 7 Vocab words.

Chemical Bonding LabChemical Formula Lewis Structure Molecular Sketch Molecular Geometry

1. H2O

2. NH3

3. CH4

4. C2H6

5. N2

6. CH2O

VSEPR Theory

Valence Shell Electron Pair Repulsion

VSEPR Theory

• Predicts the molecular shape of a bonded molecule

• Electrons around the central atom arrange themselves as far apart from each other as possible

• Unshared pairs of electrons (lone pairs) on the central atom repel the most

• So only look at what is connected to the central atom

These are for molecules with only paired electrons around

the central atom.

Linear

• 2 atoms attached to center atom• 0 unshared pairs (lone pairs)

• Bond angle = 180o

• Type: AB2

• Ex. : BeF2

Linear

• BeH2

• CO2

Trigonal Planar

• 3 atoms attached to center atom• 0 lone pairs

• Bond angle = 120o

• Type: AB3

• Ex. : AlF3

Trigonal Planar

• BCl3

• BH3

Tetrahedral

• 4 atoms attached to center atom• 0 lone pairs

• Bond angle = 109.5o

• Type: AB4

• Ex. : CH4

Tetrahedral

• PO4

Trigonal Bipyramidal

• 5 atoms attached to center atom• 0 lone pairs

• Bond angle = – equatorial -> 120o

– axial -> 90o

• Type: AB5

• Ex. : PF5

Trigonal Bipyramidal

• PCl5

Octahedral

• 6 atoms attached to center atom• 0 lone pairs

• Bond angle = 90o

• Type: AB6

• Ex. : SF6

These are for molecules with both paired and unshared (lone) pairs of electrons

around the central atom.

Bent/Angular

• 2 atoms attached to center atom• 1 or 2 lone pairs of electrons

• Bond angle = 104.5o

• Type: AB2E2

• Ex. : H2O

Bent/Angular

• NO2

Trigonal Pyramidal

• 3 atoms attached to center atom• 1 lone pair

• Bond angle = 107o

• Type: AB3E

• Ex. : NH3

Trigonal Pyramidal

• PCl3