Welcome to the College Chem 1 Toolbox!  Included here are supplemental information and exercises that will help prepare you to master the material we are covering in class.  It is intended mainly to help build a foundation in topics where you may be lacking.

Some practice with electron configurations:

The following link takes you to the trend dry lab.  This walks you through the periodic trends and why you see these trends based on Zeff and shielding: