Models of the Atom

Chapter 3 begins with a historical study of how early chemists used experimentation and reasoning to assemble models of the atom.  The Lesson 11 PowerPoint provides key vocabulary around the components of the atom (proton, electron, neutron, and nucleus). To help bring these concepts to life, we watched the Crash Course video below:

After the video, students worked with a partner through the Lesson 11 Worksheet, using a handout explaining the five models of the atom.  Notes from class are shown below:


Extend Your Learning!

Click on the infographic below to enlarge the graphic.  There is an excellent article accompanying the infographic as well that is highly encouraged reading.


Wonder what an atom actually looks like?  Using a “quantum-style” microscope, atoms of hydrogen can be seen – check out the article “Smile Hydrogen, You’re on Quantum Camera” from New Scientist magazine (2013).

Homework for this evening:

  • Read Lesson 11 in the textbook.  Login via and enter your username and password:
    • Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number).  Remember to include the dash between s and #.
    • Password: S-####### (the S must be capitalized)
  • Work through the homework problems at the end of Lesson 11 and then verify accuracy with the Lesson 11 Homework Answers.
  • Write notes for Lesson 11 on the Chapter 03 Notes handout.
  • Come to class tomorrow prepared to ask questions about anything of the homework problems from lesson 11 you did not understand.