The 4 demonstrations in this kit can be used to introduce Big Idea 1 or to review atomic structure in preparation for the AP® Chemistry Exam. The oxidation of steel wool and a colorful electrolysis demo engage students in laws of conservation and element studies. An exclusive digital kit component reveals the percent copper in brass. Finally, an irradiated salt demo gives an example of electron interactions. Materials are sufficient for the 4 demonstrations to be performed twice.