The Evolution of Atomic Theory

The Evolution of Atomic Theory

two men in old fashioned suits stand conversing. J.J. Thomson, on the left, wears eyeglasses and a bowler hat and looks pensive. Ernest Rutherford, standing on the right, gestures drawing attention to his bushy white mustache.

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.

Supplemental Materials
Grade level(s)
9-12
Guide subjects
Chemistry
History
Physics
Minority Group(s)
Muslim
Women
African-American
In-class time
45-55 minutes
Prep time
15-20 minutes
Technology Requirements
Student web access optional
Common Core Standards
Speaking & Listening
Next Generation Science Standards
Matter and Its Interactions
Waves and Their Application in Technologies for Information Transfer
Last revised