CP31 – Dots! Structures!

Date

• Monday, November 6th

Class Business

• Hand back Test 2
• Answer key posted

New Idea – Dot Structures!

• basis for using
• valence electrons
• single atoms
• examples

New Idea – Molecules

• show bonding between elements
• shared v lone pairs
• math?
• examples

Rules

• C / N / O / F  = octet always
• H / F bond 1x only
• C always in middle (no lone pairs)
• look for ionic compounds

Practice – Draw the Lewis Structures

Requirements

• formula
• valence electron count math
• Lewis Dot structure
• central atom (total / bond / lone pairs)

Homework

• Finish all compounds