## Here is some discussion and help on PS15.1 from the Help Session on Monday, November 27, 2000. (Note it may also be useful to look at the clip for PS14.9 and look at the lecture notes on the Born Haber cycle that I have put up.)

## Here is some discussion and help on PS15.3 from the Help Session on Monday, November 27, 2000. (Note: Here is a clip from lecture on Wednesday, November 22, 2000 where I introduce the concept of polar covalent bonds and nonpolar covalent bonds.)

## Here is some discussion and help on PS15.4 from the Help Session on Monday, November 27, 2000.

## Here is some discussion and help on PS15.5 from the Help Session on Monday, November 27, 2000. (Note: This problem is similar to a problem we did in PS12.)

## Here is an introduction to Lewis structures from class on Monday, November 27, 2000.

## Here is an introduction to figuring out a skeletal structure from class on Monday, November 27, 2000.

## Here is the Lewis structrue for CCl

_{4}from class on Monday, November 27, 2000.## Here is the Lewis structrue for ClO

_{2}^{-}from class on Monday, November 27, 2000.## Here is the Lewis structrue for H

_{2}SO_{4}from class on Monday, November 27, 2000.## Here is the Lewis structrue for C

_{2}H_{6}from class on Monday, November 27, 2000.## Here is the Lewis structrue for CO

_{2}and an introduction to formal charge from class on Wednesday, November 29, 2000.## Here is how use formal charge to arrive at a better Lewis structure for H

_{2}SO_{4}from class on Wednesday, November 29, 2000.## Here is Lewis structure for C

_{2}H_{4 }and C_{2}H_{2}from class on Wednesday, November 29, 2000.## Here is Lewis structure for NO

_{3}^{-}and an introduction to resonance structures_{}from class on Wednesday, November 29, 2000.## Here is some discussion and help on PS15.6 from the Help Session on Monday, November 27, 2000. (Note: In this discussion I cover part i and j and discuss multiple bonds in Lewis structures.)

----Previous Announcements----

Tables 2.3 (p 67), 2.4 (p 69), 2.5 (p 69) and 2.7 (p 73). I'll give you some tricks to make Tables 2.3 and 2.4 real easy to remember, but Table 2.5 and 2.7 have to be memorized. I promise the first exam will have some nomenclature questions.

names and symbols of the first 20 elements and 20 common elements;

the formula and phase of all of the elements in the periodic table;

the common prefixes for SI units;

.

- e-Mail addresses for our TAs
Christopher Damaso: c_damaso@hotmail.com

Nellie Bruce: brucen@okstate.edu

Tyler Johannes: johanne@okstate.edu

Melissa Caldwell: mcaldwe@okstate.edu

Carolyn Nuckolls" wcaroly@okstate.edu

Claudia Dollins: geierc@okstate.eduCory Pfeifer: pfeifer@okstate.edu

Jeff Karcher:jefferykarcher@aol.com

Jennifer Veach: veachj@okstate.edu

Holly Dale: zipp_n@hotmail.com

Andrew McGee: mcgeea@biochem.okstate.edu- Our TAs for this semester are;

## Section 2:

## Christopher Damaso(Sections 10, 12, and 14);

Nellie Bruce (Section 11);

Tyler Johannes (Sections 13 and 15):

Melissa Caldwell (Section 16);

Carolyn Nuckolls (Section 17);

Claudia Dollins (Section 18);

Section 3;## Cory Pfeifer (Sections 19 and 24);

Jeff Karcher (Section 20)

Jennifer Veach (Section 21);

Holly Dale (Sections 22 and 26);

Andrew McGee (Sections 23, 25 and 27)

## Announcements for Wednesday, November 29, 2000

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