Three things:.

2. The CheMagic Show -- On Monday we will work on this in small groups, I will bring the supplies, as much as I know of, and you MUST bring a printout of directions for your act, and any props you need. Class still starts at 9:10, even if we start with 4square.  Don't be late.
3. ...and the homework, a video review of  first principles: http://www.learner.org/courses/chemistry/video/vidbyunit_1.html
30 minutes
4.  and also review-read chapter 25, sections 1&2, and read section 3 (no notes, but highlight/underline what you think you might want to  remember for a quiz)