Molecular Structures

1
Molecular Structures
2
Predicting Lewis Structures

• Predict the locations for certain atoms
• Find the total electrons available to bond
• Determine the number of bonding pairs by dividing
  2 by 2
• Place one bond between the central atom and the
  others
• Figure out how many bonds are left over, place
  the remaining electron pairs
• Determine the locations of double or triple bonds
  based on the octet rule

3
For example

• CO2

4
Polyatomics

• PO43-

5
diy

• NF3
• CS2
• BH3
• ClO4-
• NH4

6
Homework!

• Read Section 9.4 and complete the Practice
  Problems 49-53 on page 262