links for 2008-10-21

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Some months ago I made a (seemingly idle) threat to follow up my basic concepts posts on polar and non-po
As promised at the end of my post on polar and non-polar molecules, here's a basic concepts post on
What list of basic concepts would be complete without a primer on polar and non-polar molecules?
A mysterious gap in posting? Must be finals time! As of now I'm done. We'll see how they went. One of them went well for sure, the other sort of depends. My own students are having their own exams as well, and I've got my fingers crossed for them.