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Atomic Theory WebQuest Name: ______________________________ Period: ________ The websites for research can be found at: http://www.jmolds.k12.nf.ca/ This is a condensed version of what will be seen online. Follow ONLY these instructions!!! Introduction The development of atomic models has been a continuous progression throughout history. Dalton, Thomson, Rutherford and Bohr were four scientists who made major contributions to our understanding of atoms. Each proposed a "changed" model of the atom that was based on current and previous research. Each new discovery dealing with the nature of the atom lead to new atomic model. During this webquest, you will learn the history of the atomic models developed by Dalton, Thomson, Rutherford and Bohr. In reconstructing history it is a major objective that you will develop a greater understanding of the aspects of the nature of science, a component which is often forgotten in science education. Task You will explore the development of atomic models. You will learn about the atom, how the concept of the atom has changed over time and how this illustrates several aspects of the nature of science. You will research and answer questions in relation to the development of the atomic models for each of the following scientists. After you have answered the questions, each person will construct a chart, displaying all 4 of the various atomic models (1 per quarter page). Each model should be labeled. Scientists John Dalton Sir Joseph John Thomson Sir Ernest Rutherford Niels Bohr Process Use the listed websites to answer the questions below about each scientist and their atomic model. John Dalton In what period of time did he live? What is his country of origin? What was his profession? Describe his model of the atom? Were his beliefs accepted by society at the time? What were the four basic ideas (more may be listed) of John Dalton's Theory? 1. 2. 3. 4. How did John Dalton's discovery of the atom change our view of the atom or it's properties? How did his approach differ from wharf we call the "scientific method"? J. J. Thomson In what period of time did he live? What is his country of origin? When did he conduct his experiment? What was he studying? Summarize his experiment (what he did and what was discovered) Describe his model of the atom Were his beliefs accepted by society at that time? Ernest Rutherford In what period of time did he live? What is his country of origin? When did he conduct his experiment? What was he trying to prove with his experiment? Summarize his experiment ( what he did and what he discovered). Why was he surprised by his experimental results? How did his results fit with Thomson's view of the atom? Describe his model of the atom. Were his beliefs accepted by society at that time? Neils Bohr In what period of time did he live? What is his country of origin? When did he conduct his experiment? Summarize his experiment( What he did and what he discovered). Describe his model of the atom Since electrons and protons are oppositely charged, the electrons should be attached to the nucleus.How did Bohr explain that this does not occur? Were his beliefs accepted by society at that time? How did Bohr overcome the problem with the Rutherford model of the atom?