In this video, Dr. Harold Goldwhite gives an introduction to Empirical and Molecular Formulas.
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Educator.com
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A brief history and time-line for the study of the Atom
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The Particle Adventure
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An interactive simulation that allows students to see how scientists could have figured out the structure of the atom by experimenting with different models.
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Interactive Simulations: Models of the Hydrogen Atom
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Discusses the difference between shielding electrons and valence electrons, with several examples.
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Clackamas Community College
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Multiple choice questions covering the structure of an atom.
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Oswego Regents Prep
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Basic explanation and diagrams of atomic structure and how it relates to light energy.
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Goddard Space Flight Center
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AP Chemistry Polyatomic Ions
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StudyStack
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