A video demonstration of Electron Configurations from Salman Khan of Khan Academy.
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Khan Academy
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An interactive slide show that uses animations to clearly explain electron configurations and provides practice questions with feedback.
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Electron Configuration
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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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A handy guide to VSEPR electron configurations.
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Encylopedia Britannica
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This gives a table of colors by which to identify different compounds in flame tests.
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About.com: Chemistry
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provides elements, mass, electron configuration, half life, atomic radius, EN, etc
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Periodic table of elements
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Clean periodic table with common properties laid out in an easy to find table.
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ChemiCool
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