Reflection: Grappling with Complexity How The Electron Was Discovered - Section 2: Teacher Demonstration


Be very careful when presenting these two atomic models (Dalton's Atomic Model, J.J. Thomson's Plumb Pudding Model) as they are incorrect. I only include these in our discussion to provide a frame of reference to our current atomic model. You would not want to place a science misconception in your student's brain. Misconception are difficult to overcome once they have become established. Typically students will construct elaborate explanations that allow these initial misconceptions to remain true to the child.

  Do not overemphasize these atomic models
  Grappling with Complexity: Do not overemphasize these atomic models
Loading resource...

How The Electron Was Discovered

Unit 4: Atomic Structure
Lesson 3 of 5

Objective: Students will be able to explain how the electron was discovered by J.J. Thomson and the contribution it made to our current atomic model.

Big Idea: Students always ask me how can we know what at atom looks like if we can't see them. This lesson is part two of three explaining how we developed our modern atomic model using the discovery of the electron.

  Print Lesson
2 teachers like this lesson
  45 minutes
jj thompson
Similar Lessons
Density of Solids and Liquids
8th Grade Science » Heat Transfer and Interactions of Matter
Big Idea: A tried and true lesson for introducing or reviewing how to measure the density of solids and liquids.
Brookline, MA
Environment: Urban
Ryan Keser
Molecules Matter
6th Grade Science » Matter
Big Idea: Students see that matter is composed of tiny objects that are attracted to one another.
East Walpole, MA
Environment: Suburban
David Kujawski
What is Matter?
6th Grade Science » States of Matter
Big Idea: Students need to understand complex vocabulary in their own way. This lesson allows them to make sense of the word matter in their own terms.
Brooklyn, NY
Environment: Urban
Drewe Warndorff
Something went wrong. See details for more info
Nothing to upload