Discusses the difference between shielding electrons and valence electrons, with several examples.
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Clackamas Community College
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Printable study cards (.pdf format) covering chemical bonding: ionic and covalent bonding, Lewis structures, electronegativity, shapes of molecules.
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Chemmybear.com, Paul Groves of South Pasadena High School
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basic quantum theory, atomic spectra, electron configurations, chemical periodicity and the organization of the periodic table.
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Atoms and the periodic table
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BIO205 - Ch 2 - Chemical Principles - RioSalado - AZ
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StudyStack
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A video demonstration of Ionization Energy and Periodic Table Trends from Salman Khan of Khan Academy.
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Khan Academy
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Printable study cards (.pdf format) covering the periodic table: periodic trends, ionization energy, history.
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Chemmybear.com, Paul Groves of South Pasadena High School
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