In my class, I would not always go in order of most textbooks and would start with the Atom and the Periodic Table -- I realize that you may be working in the order of your department, or the textbook used. Some books get into Gas Laws now, and Kinetic-Molecular theory is a good beginning concept.
Of course there's chemistry laboratory safety -- hmmm.
So, please write to me with what you're currently teaching and what topics are next.
Thanks for your feedback!