The Atom Experience

Name:______Block:______The Atom Experience Instructions: Thomson-Rutherford Atomic Model Simulation 1. Either type in: http://phet.colorado.edu/simulations/ or Google “phet” 2. Click on Chemistry on the left side

3. Click on Rutherford Scattering

4. Click on Run Now Side Note: To start both simulations you must click on the red middle button Thomson Assignment: Click on the Plum Pudding Atom tab. Pretend you are Dr. Thomson and you are watching this experiment for the first time. 1. If you were J.J. Thomson, explain what is happening in this simulation.

2. Create an experimental conclusion on the structure of the atom and its parts from what you have seen in this simulation.

3. Draw the atom how you, J.J Thomson, see it to be from what you learned in this simulation. Rutherford Assignment: Click on the Rutherford Atom tab. Pretend you are Dr. Rutherford and you are watching this experiment for the first time. 1. If you were Ernest Rutherford, how would you explain what is happening in this simulation?

2. Use the features in this simulation to help prove your thoughts. Explain what you changed in the data table below. Variable changed Observation Possible explanation of the result

3. What do you think an alpha particle is? Be sure to explain your thinking.

4. As Ernest Rutherford, what conclusions would you make about the atom based on this simulation? Thomson vs Rutherford Assignment: 1. Compare and Contrast Thomson’s view of the atom to Rutherford’s view of the atom.

Rutherford Thomson

Directions:

1. Open a browser and go to the ChemThink site at www.chemthink.com 2. On the right hand side of the screen, click on the words”Not Registered?” 3. Enter the code written below to identify you as one of your teacher’s students. Then click on the register button.

Your code is: ______

This will call up the registration screen where you will enter your first name, last name, a user name, and password. You must also choose the period for your class.

4. Click on the Register Now button to complete the process.

5. Write down your user name ______

6. Write down your password ______

7. The code is good until ______. After that time your teacher will have to give you a new code. 8. Part I a) Page: Welcome to ChemThink. b) Click on the Atom c) Choose Atomic Structure d) Click on tutorial e) MUST COMPLETE TUTORIAL f) Click on: Try the questions. g) MUST COMPLETE QUESTION SET h) Click Return to home. 10. Part II a) Click on the Atom b) Choose Isotopes c) Click on Tutorial d)MUST COMPLETE TUTORIAL e)Click on Try the questions f)MUST COMPLETE QUESTION SET