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Lewis Structures

Lewis Structures. Lewis Structures. Electron dot notation is used to shown how electrons are shared Molecules are formed Each molecule has 8 valence electrons Except Hydrogen!. Lewis Structure of Water. Each line represents the sharing of 2 electrons. Lewis Structures. Lone Pair.

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Lewis Structures

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  1. Lewis Structures

  2. Lewis Structures • Electron dot notation is used to shown how electrons are shared • Molecules are formed • Each molecule has 8 valence electrons • Except Hydrogen!

  3. Lewis Structure of Water Each line represents the sharing of 2 electrons

  4. Lewis Structures Lone Pair

  5. Draw the Lewis structure • PH3 • H2S • HCl • CCl4 • SiH4

  6. Draw the following… • H2 • HF • F2

  7. Lewis Structure Practice • CBr4 • SeF2 • C3H8 • H2O • NH4+ • NH3 • C2H6 • SO42- • CF2Br2

  8. Sigma Bonds • Single Bonds • Symbol : σ • Double Bonds • Symbol: π PI Bonds

  9. Multiple Bonds • Draw O3

  10. Multiple Bonds • Draw O2

  11. Try These… • N2 • C2H2 • CO2

  12. Online Practice

  13. Bond strength • As the number of shared electrons increases, bond length decreases • Breaking the bond of a short bond is larger than a long bond

  14. Resonance structures nitrate ion CHO2-1 O3

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