Chemistry Honors – Class 33

Dates

• Period A: Friday, October 30th
• Period B: Monday, November 2nd
• Period F: Monday, November 2nd

Lewis Structures – Formal Charge

• why use? help verify structure
• in general – FC should be zero
• if not possible, the more EN element has more negative FC
• sum of FC = overall charge of molecule ion
• FC = #valence – (lone pairs + 1/2 bonding pairs)
• Examples / Practice = Ch. 8 (81, 82, 84)

Examples

Homework

• No HW