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W2-Lewis Structures
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W2-Lewis Structures

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Questions and Answers

Which molecule exhibits an exception to the octet rule?

  • $CHBr_3$
  • $SF_4$
  • $CO_2$
  • $NO$ (correct)

    • What is the total number of valence electrons in bromoform (CHBr3)?

  • 32
  • 20
  • 26 (correct)
  • 18

    • Which molecule has more than an octet for one of its atoms?

  • $CHBr_3$
  • $NO_2$
  • $CO_2$
  • $SF_4$ (correct)

    • What type of molecules are exceptions to the octet rule?

    <p>Molecules with an odd number of electrons and those in which an atom has less than an octet.</p> Signup and view all the answers

    What is the formula for calculating formal charges in a Lewis structure?

    <p>Number of valence electrons minus number of electrons assigned to the atom</p> Signup and view all the answers

    In the Lewis structure of NO+, how many valence electrons are there?

    <p>10</p> Signup and view all the answers

    Which atom is preferred to have a positive formal charge in a Lewis structure?

    <p>The least electronegative atom</p> Signup and view all the answers

    What does resonance refer to in the context of Lewis structures?

    <p>Redistribution of valence electrons</p> Signup and view all the answers

    What is a radical or free radical in chemistry?

    <p>$O_2$ molecule with unpaired electrons</p> Signup and view all the answers

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