Announcements1. Exam #3: Thursday, Dec. 5th, 7:00-

8:15pm (Conflict: 5:15-6:30pm)No calculators allowed

2. Activity 3: Making Models of Molecules lab write-up due in Friday discussion

3. Lon-capa HW Remaining1. Homework 6 – Type 2 due Wed, 11/20 by 7pm2. Homework 7 – Type 1 due Monday, 12/2 by

7pm3. Homework 8 – Type 1 due Tuesday, 12/3 by

7pm4. Review Questions for Exam III due Wed, 12/4

by 10pm

Electronegativity

Clicker #1Rank the following bonds from least polar to most polar:

Si-Cl P-Cl Mg-ClS-Cl

A) S-Cl, P-Cl, Mg-Cl, Si-ClB) P-Cl, S-Cl, Si-Cl, Mg-ClC) Mg-Cl, Si-Cl, P-Cl, S-ClD) Mg-Cl, S-Cl, P-Cl, Si-ClE) S-Cl, P-Cl, Si-Cl, Mg-Cl

Clicker #2How many electrons would hydrogen have to share in a covalent bond in order to have a noble gas electron configuration?

A) 0B) 2C) 3D) 6E) 8

General Rules…1. Follow the octet rule.2. Follow the duet rule for hydrogen.3. The total number of electrons in your

Lewis structure must equal the total number of valence electrons.

4. The least electronegative atom is typically the central atom (except for hydrogen).