Chapter+6+Chemical+Bonding+Student+Version

Chapter+6+Chemical+Bonding+Student+Version - CHAPTER 6,...

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C HAPTER 6, C HEMICAL B ONDING CHEM 1310- G Fall 2009 1
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C HAPTER 13, O BJECTIVES 6.1: Explain the basic concepts surrounding bonding including the Leonard – Jones potential, electronegativity, ionization, and electron affinity. 6.2: Illustrate the spectrum of bonding based upon percent ionic character. 6.3: Discuss Lewis Structures and the Octet Rule with an emphasis on exceptions. 6.4: Describe resonance and formal charges. 6.5: Discuss VSEPR theory 6.6: Outline the characteristics of polar bonds and polar molecules. 2
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B ONDING IS THEORETICAL ! “Sometimes it seems to me that a bond between atoms has become so real, so tangible, so friendly, that I can almost see it. Then I awake with a little shock, for a chemical bond is not a real thing. It does not exist. No one has ever seen one. No one ever can. It is a figment of our own imagination.” Charles A. Coulson, 1955 1910-1974 University of Oxford 3
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B ONDS ARE FIGMENTS OF OUR IMAGINATION “ What we represent, when we draw a molecule, is what we want to represent: we abstract a piece of reality to show it to another person." Roald Hoffmann Chemistry Nobel Laureate Cornell University 4
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O BJECTIVE 6.1 6.1: Explain the basic concepts surrounding bonding including the Leonard – Jones potential, electronegativity, ionization, and electron affinity. 5
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T HE F UNDAMENTALS OF B OND F ORMATION Electrons can be divided into: Core electrons (electrons in a filled shell) Valence electrons (electrons in an unfilled shell, outermost electrons) The valence electrons are the most shielded and have the smallest effective nuclear charge (Z eff ) Bonding is divided into two categories ionic and covalent . 6
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E LECTRONEGATIVITY The electronegativity of an atom serves as the basis for classifying chemical bonds. Electronegativity should not be confused with the chemical process of electron affinity. 7
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Moments in a Life 1954 Nobel Prize in chemistry Chemical Bonding, molecular biology 1962 Nobel Peace Prize Health (Vitamin C advocate) and Nuclear testing (banning atmospheric tests ) Electronegativity Scale : concept of partially ionic bonds.
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This note was uploaded on 04/12/2010 for the course CS 1371 taught by Professor Stallworth during the Spring '08 term at Georgia Institute of Technology.

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Chapter+6+Chemical+Bonding+Student+Version - CHAPTER 6,...

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