2-Periodicity - 1 Periodicity Optional Suggested Problems...

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Unformatted text preview: 1 Periodicity Optional Suggested Problems Shultz Chapter 3 # 21, 23, 29, 33, 35, 59, 61, 63, 65, 67 Fine Chapter 8 Questions: # 16, 22 Problems: # 3, 17, 19, 23, 25 2 Periodic Trends trends in the properties of the elements generally reflect how strongly valence electrons are attracted to the nucleus the attraction is Coulombic r - distance from the nucleus, i.e., which shell the valence electrons are in q + - the effective net positive charge attracting the valence electrons q+ is approximately equal to the number of valence electrons in the neutral atom F q + q- r 2 3 Sizes of Atoms and Ions Atomic radius is difficult to define the probability of finding an electron never drops to zero Atomic radii are often determined from measuring internuclear distances Covalent Radius Na 2 (g) Metallic Radius Na(s) Ionic Radius Na + Cl- (s) 4 5 Graphs of radial probability function for n = 1, 2 and 3 of hydrogen 6 7 The Atomic Radius of Elements (pm) 8 Ionic Radius Cations are smaller than the atoms from which they are formed....
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This note was uploaded on 11/14/2009 for the course CHEMISTRY CHEM 154 taught by Professor Dapkus during the Spring '09 term at The University of British Columbia.

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2-Periodicity - 1 Periodicity Optional Suggested Problems...

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