Lewis Structures

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Lewis Structures
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Localized Electron Bonding Model (LE)

• Assumption a molecule is composed of atoms that
  are bound together by sharing pairs of electrons
  using the atomic orbitals of the bound atoms.

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Localized Electron Bonding Model (LE) Parts

1. Description of the valence electron arrangement
   using Lewis structures
2. Prediction of the geometry using the valence
   shell electron-pair repulsion (VSEPR) model
3. Description of the type of atomic orbitals used
   by the atoms to share electrons or hold lone
   pairs

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Lewis Structures

• What is the most important requirement for the
  formation of stable compounds?
• Answer The elements achieve noble gas electron
  configurations
• This requirement applies to both ionic compounds
  and covalent molecules!

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Review Lewis Structures

• Write Lewis dot diagrams for the following
• K
• Br
• K1
• Br-1
• F
• Fluoride ion
• (Draw ionic/covalent diagrams to show
  lone/bonding pairs.)

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Steps for Writing Lewis Structures

• Found on p.376!!!
• Examine examples on pp.376-378.
• Expand What is the configuration for HCN?