Cathode Rays Lead to Thomson's Model of the Atom

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Examine the experiment that led to the present-day atomic model. The video experiment shows the stream of electrons that travel through a vacuum between an anode and cathode. J.J. Thompson's model of an atom provides the explanation for these electrons.

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CCSS: Adaptable
Instructional Ideas

  • Have pupils create a timeline of the different atomic models
Classroom Considerations

  • Requires an understanding of the subatomic particles of an atom
  • Monitor the YouTube comments if making the video available for independent viewing

  • Inserts humor within the lesson to add interest
  • Discusses different theories of the makeup of the atom

  • None
Common Core