Assignment+3

The History of the Atomic Theory

Create a new page Titled Atomic Theory and also create a link to that page here.

All your work for this assignment will be posted on the Atomic Theory Page.

Assignment Instructions

__ Introduction __

If you were asked to draw the structure of an atom, what would you draw? Throughout history scientists have accepted five atomic models. Our perception of the atom has changed from the early Greek model because of clues or evidences that have been gathered through scientific experiments. As more evidence was gathered old models were discarded or improved upon. Your goal is to trace the atomic theory through history.

__ Task __

You will use the sources provided to develop a briefing that outlines the key scientists and experiments associated with the development of modern atomic theory. The briefing should include the names of the scientists, a description of the accomplishments, pictures of experimental equipment or atomic models, and description.

__ Process __
 * 1) Read the entire WebQuest !
 * 2) Begin your research by using your textbook and the links provided in the resource section of the webquest to complete a research data sheet for each of the following scientists, experiments, and atomic models:

Democritus J.J. Thomson Gold Foil Experiment Cathode Ray Tube Law of Definite Proportions Plum Pudding Atomic Model Bohr Planetary Model James Chadwick Erwin Schrodinger Eugen Goldstein Law of Conservation of Mass Dalton's Atomic Theory Rutherford Model Quantum Mechanical Model || Antoine Lavoisier Ernest Rutherford Dmitri Mendeleev Niels Bohr
 * Robert Millikan

Henry Moseley John Dalton ||

Prepare a timeline: // A timeline is in chronological order – earliest time to latest time. Because you are going to keep your comments to 1-2 sentences, a report will not be appropriate. If you would prefer to do a PowerPoint presentation movie maker presentation, please discuss with the teacher and get approval. //
 * 1) It should include information from your [|research data sheets] presented in chronological order and pictures to illustrate your information.
 * 2) In 1-2 sentences tell the importance of the discovery that relates to the structure of the atom (some of these people did many types of research)

[|Timeline Tool] []

__ References __

Atom The incredible world []

[|The Atom - Info and Democritus, Plum Pudding, Rutherford Models] []

History of the electron []

JJ Thompson []

Nobel Prize []

[|Timeline] []

Atomic Theory 1: The early days []

Atomic Theory 2: Electrons in Atoms []

[]

The Bohr Model []

The Bohr Atom [|http://www.iun.edu/~cpanhd/C101webnotes/modern-atomic-theory/Bohr-model.html]

Dalton's Atomic Theory [|http://dl.clackamas.cc.or.us/ch104-04/dalton's.htm]

Dalton's atomic Theory [|http://www.iun.edu/~cpanhd/C101webnotes/composition/dalton.html]

__ Evaluation __ [|atomicmodelrubric-1.doc]

__ Conclusion __

After completing your project you should be able to: 1) Demonstrate an understanding of the present model of the atom by identifying the parts of the atom, the subatomic particle charges, and the relative location of each particle. 2) Demonstrate your knowledge of the history of the atomic theory by constructing a chronological order of events.

__ Credits __

Webquest modified from [|http://www2.yk.psu.edu/~mer7/ruppquest/chemwebquest.html]