I need to draw your attention to a difference in terms used by our textbook and me in class. The textbook refers to atomic solids. I have NOT referred to atomic solids in class. I used the terms extended covalent solids and metallic solids. (Besides covalent and ionic solids which are described in our textbook.) Be sure to check the WEB notes or your class notes so you understand the difference in terms. I expect you to use; extended covalent bonding (solid) when describing the type of interaction in diamond, graphite, silicon and silicon dioxide; and metallic bonding when describing the type of interaction in metallic elements. Bring questions up in the HELP Session tonight!

I've changed my mind on what we will cover in Chapter 15. The problem set covers some aspects of expressing concentration that the textbook does not. So I will conform to the textbook on this particular issue. So there needs to be some minor changes in PS7.

Problem Set #7 due date has been postponed to Wednesday, March 3, 1999

Check out the sample questions for our Exam II.

Help Session tentatively scheduled for Monday, March 1, 1999 at 7:30 p.m. in PS141.

Check out the changes in this week's laboratory.

A new quiz covering Chapter 13 problems is now available. There are a few 'interesting' problems in this set.

I need some volunteers to check some of the digital files I have been working on this past week. Send me an e-mail if you are interested and we'll discuss what is involved.

Be sure to read the laboratory for this week BEFORE coming to laboratory. The TA's have expressed some concern about whether students are reading the laboratory before lab. Remember the TA can administer a pre-laboratory quiz to see if you know your stuff!

For predicting the products of chemical reactions (remember this is one of my favorite types of questions) I recommend you review the following notes from CHEM 1215;

Chapter 7 notes

Summarizing chemical equations notes

You may also find some useful information in Chapter 6 notes

Some concern about the the availability of the answers to the PS has been expressed. I've checked the link and everything is working correctly from my computers. If you are having difficulty downloading the answers to the PS contact me. It should work...if it does not there is something the matter with the computer system you are using.

Still plenty of time to enjoy some 'fun', try the Take a Quiz link. I am not grading this so take it to see what you understand from the first two lectures. Make a note of the questions you answered correctly and incorrectly. Drop by my office if you have any questions. Let me know if you like this, we may do it again.

If you had CHEM 1215 with me last semester and you would like your Exam IV and Final Exam, just drop by my office.

Remember CHEM 1225 is a 2nd semester chemistry course. It is assumed that you have had CHEM 1215 or equivalent. If you have questions about your chemistry background drop by my office and we can talk. BTW I have a meeting at 10:00 a.m. on Wednesday, January 13, and will not be able to hold my office hours at that time.

The first two weeks of laboratory will spend time on a review problem set and Exercise 1, 2 and 3 in the CHEM 1225 Lab Manual. If you have Monday lab...DO NOT MISS IT!!

This semester I've added a new link called 'What's Important'. In this section I will discuss the important concepts in a chapter and try to relate the concepts covered in the chapter. I'll also try to provide some 'reasons' why you might want to learn this material.