1. Understanding Models of the Atom Darrell White

2. Problem Students often have difficulty understanding historical models of the atom. Plum pudding model vs. Rutherford Model

3. Solution PHET simulation of Rutherford Scattering Simulator allows students to view what occurred with Rutherfords model and the previous Plum Pudding model presented by J.J. Thompson. http://phet.colorado.edu/en/simulation/rutherford- scattering http://phet.colorado.edu/en/simulation/rutherford- scattering

4. Standards: CLE 3221.Inq.1 Recognize that science is a progressive endeavor that reevaluates and extends what is already accepted. CLE 3221.1.1 Compare and contrast historical models of the atom