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Atomic Theory Project 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 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 and then place the discoveries, experiments, and atomic models in chronological order. Assignment: This assignment will allow you to observe how the Atomic Theory started as a philosophical idea and has been modernized to our current physical Electron Cloud Model. You will compile and organize fifteen scientist’s discoveries relevant to the Atomic Theory. The scientists have ascertained more and more quantitative experimentation, direct and indirect evidence, and utilized the evidence to develop five different atomic models. As more and more information became available, scientists discarded parts of older theories to design an atomic model that provided a more accurate representation of the current atom. It is important for scientists to challenge current theories and modify them as more knowledge becomes available. During this project, you will illustrate the progression of the Atomic Theory by comparing and organizing the different models. A timeline is in chronological order—earliest to most recent. You will search both print and Internet sources to investigate and organize information and images about the scientists and their discoveries that have led to our current knowledge of the structure of the atom. Using your research, construct a timeline in book form as a visual representation of the development of modern atomic theory. You may use any of the following websites or you may search other websites and use media center resources. However, you must cite all resources you use on your work cited page! CPS Chemistry Atomic Theory Project Include the following in your timeline: 1. Names and image of all 15 scientists listed below 2. The year of the scientists discovery 3. 3-4 sentences telling the importance of the discovery that relates to the structure of the atom (some of these scientists did many types of research) 4. Include images of the 5 models of the atom listed below and images of any experimental equipment used in important physical discoveries (label all equipment!) Scientists: Marie & Pierre Curie John Dalton James Chadwick Ernest Rutherford Antoine Lavoisier J.J. Thomson Democritus Henri Becquerel Robert Millikan Michael Faraday Joseph Louis Proust Neils Bohr Albert Einstein Max Planck Aristotle 5 models: Democritus model Thomson model Rutherford model Bohr model Modern Electron Cloud model CPS Chemistry Atomic Theory Project Websites History: Atom- The Incredible World: http://library.thinkquest.org/19662/low/eng/index.html Aristotle: http://www.ucmp.berkeley.edu/history/aristotle.html Atoms: http://www.nobeliefs.com/atom.htm History of the Atom: http://www.neoam.cc.ok.us/~rjones/Pages/online1014/chemistry/chapter_8/pages/history_of_ato m.html#mendeleev%20anchor Models: Bohr: http://csep10.phys.utk.edu/astr162/lect/light/bohr.html Plum Pudding and Rutherford: http://www.iun.edu/~cpanhd/C101webnotes/modern-atomictheory/rutherford-model.html Atomic Models: http://www.jdenuno.com/Chemistry/4-AtomModels.pdf CPS Chemistry Atomic Theory Project
