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J.J. Thomson and Ernest Rutherford conversing, Cavendish Laboratory, University of Cambridge. Photograph by D. Schoenberg, courtesy of AIP Emilio Segrè Visual Archives, Bainbridge Collection.
This lesson plan covers major developments and changes in atomic theory, with a focus on the 1800s and 1900s. Students will make timelines, read real primary sources of the discoveries in atomic theory, and either learn how to model atoms or conduct research on underrepresented scientists who contributed to breakthrough discoveries in atomic theory.