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Chemistry LibreTexts

Chapter 8: Chemical Bonding and Molecular Structures

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  • 8.1: Lewis Dot Symbols and the Octet Rule
    Why are some substances chemically bonded molecules and others are an association of ions? The answer to this question depends upon the electronic structures of the atoms and nature of the chemical forces within the compounds. Although there are no sharply defined boundaries, chemical bonds are typically classified into three main types: ionic bonds, covalent bonds, and metallic bonds.
  • 8.2: Bond Polarity and Electronegativity
  • 8.3: Writing Lewis Structures
  • 8.4: Resonance
  • 8.5: Exceptions to the Octet Rule
  • 8.6: Bond Enthalpies
  • 8.7: Molecular Geometry
    The Lewis electron-dot structures you have learned to draw have no geometrical significance other than depicting the order in which the various atoms are connected to one another. Nevertheless, a slight extension of the simple shared-electron pair concept is capable of rationalizing and predicting the geometry of the bonds around a given atom in a wide variety of situations.
  • 8.8: Dipole Moments
    Dipole moments occur when there is a separation of charge. They can occur between two ions in an ionic bond or between atoms in a covalent bond; dipole moments arise from differences in electronegativity. The larger the difference in electronegativity, the larger the dipole moment. The distance between the charge separation is also a deciding factor into the size of the dipole moment. The dipole moment is a measure of the polarity of the molecule.


Chapter 8: Chemical Bonding and Molecular Structures is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts.

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