click on the atom builder activity
Photoelectron spectroscopy is a relatively new topic on the AP exam, but provides a useful piece of evidence for the orbital structure of multielectron elements.
Chapter 4 slideshow
chpt 6 continued.
Chapter 6 study review game
Chemteam.info has some problems related to electromagnetism and electrons, but lacks depth in presenting some of the later problems around electron configuration. This their link on electromagnetism
(Following is a study guide on electron structure, from an honors class several years ago)