1. Quick Quizzes

2. Newton What is Newton’s 1 st law? What is Newton’s 2 nd law? What is Newton’s 3 rd law? Who is this?

3. How do computers work? Which computer components do the following? Provide short term storage Provide long-term storage Allow the communication between components Perform calculations

4. Binary What is the binary number 1110 in decimal? What is the number 10 in binary?

5. Bonds Arrange the following bonds in order of length: C-Br C-F H-H C-H H-O-H  OH 2 hydrogen bond C-C C=N C=C in benzene

6. Bonds Arrange the following bonds in order of length: C-Br (1.94 Å) C-F (1.37 Å) H-H (0.74 Å) C-H (1.09 Å) H-O-H  OH 2 hydrogen bond (1.97 Å) C-C (1.54 Å) C=N (1.25 Å) C=C in benzene (1.40 Å)

7. Bonds Arrange the following bonds in order of length: H-H (0.74 Å) C-H (1.09 Å) C=N (1.25 Å) C-F (1.37 Å) C=C in benzene (1.40 Å) C-C (1.54 Å) C-Br (1.94 Å) H-O-H  OH 2 hydrogen bond (1.97 Å)

8. Maxima and minima On this contour map find: A maximum A minimum A saddle point A point where the gradients are zero (in all dimensions) and the second derivatives are all negative

9. Boltzmann What does the Boltzmann equation tell us? What is it? What are N i and N j ? What happens to Ni/Nj if we make the system hotter? What is kT at 298 K? 2.479 ≅ 2.5

10. What is a force field?

11. Bonding Draw the expected potential energy curve for two atoms that are bonded together What units would you expect to see on the axes? What does the minimum energy point represent? Why can we approximate the atom bonding potential with a quadratic function?

12. Force - fields What is a ‘United Atom’ force field? Why would you use one? What is a class one force field? What are ‘cross terms’