Discusses periodic trends in atomic and ionic radius, with pictures and some discussion of the electron configurations behind the trends.
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ChemGuide
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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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Chapter 6 - Standard Esthetics
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StudyStack
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A video demonstration of Periodic Table Trends 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 the periodic table and its trends. Includes practice questions with feedback.
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The Periodic Table
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Explains most of the periodic trends in terms of shielding of the nucleus by the inner shells of electrons. Includes a discussion of size (radius), ionization energy, electron affinity, electronegativity, metallic character, reactivity and common charges.
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Indian Institute of Technology
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1-36 Periodic Elements + Ag Pt Au Hg Sn Pb I Rn U
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StudyStack
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Multiple choice questions covering the periodic table and trends.
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Oswego Regents Prep
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Great quiz on the periodic table including trends and the history of the periodic table. Useful for students studying for a periodic table test.
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Avon Chemistry
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