Creating a Positive Learning Environment for Everyone Be respectful of your classmates Save conversation for clicker portions of lecture Put cell phones in “airplane” mode Turn off tablets Close laptops

Announcements Exam #3: Thursday, Dec. 7th, 7:00-8:30pm (Conflict: 5:00-6:30pm, sign up in 1026 Chemistry Annex by NOON Thursday) No calculators allowed Exam room locations posted online Q & A TA Review Sessions posted online Lon-capa HW Remaining Homework 8 – Type 1 due tomorrow, 12/6 by 7pm Review Questions for Exam III due tomorrow, 12/6 by 10pm Prelecture Assignment 24 – last one (due 12/12) Online ICES Evaluations – please complete!

Overall goal: Atomic Structure Chemical Bonding 3D Molecular Structure Molecular Properties

Clicker #1 Which of the following has the strongest London dispersion forces? A) Cl2 B) Br2 C) I2 D) All of the above have the same amount of London dispersion forces.

Clicker #2 How many of the following interactions does CH3CH2OH exhibit? London dispersion dipole-dipole hydrogen bonding A) 0 B) 1 C) 2 D) 3

Clicker #3 How many of the following interactions does CH3OCH3 exhibit? London dispersion dipole-dipole hydrogen bonding A) 0 B) 1 C) 2 D) 3

Clicker #4 Choose the molecule with the highest boiling point. (Hint: Is each polar or nonpolar?) a) SeO3 b) SeO2 c) H2

Clicker #5 Is methane (CH4) expected to dissolve in H2O? A) Yes – Both are polar. B) Yes – CH4 is nonpolar and H2O is polar. C) Yes – Both are nonpolar. D) No – Both are nonpolar. E) No - CH4 is nonpolar and H2O is polar.