Discusses the difference between shielding electrons and valence electrons, with several examples.
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Clackamas Community College
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This web site shows three dimentional pictures of atomic orbitals which are color coded to show positive and negative charges of the orbitals. General orbital configuration can be viewed as well as orbitals of specific elements once n, l, and m are known
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Orbitals
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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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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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BIO205 - Ch 2 - Chemical Principles - RioSalado - AZ
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StudyStack
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A video demonstration of orbitals from Salman Khan of Khan Academy.
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Khan Academy
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An explanation of what valence electrons are and how they relate to the periodic table.
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Clackamas Community College Science Department
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