Exceptions to Octet Rule in Lewis Structures
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Questions and Answers

In VSEPR theory, what is the bond angle for a molecule with a trigonal bipyramidal shape?

  • 180°
  • 120°
  • 107°
  • 90° and 120° (correct)

    • Which type of bond is known as a non-polar covalent bond?

  • Ionic bond
  • Double covalent bond
  • Single covalent bond (correct)
  • Triple covalent bond

    • What is the bond angle for a molecule with a bent shape?

  • 180°
  • 120°
  • 104.5° (correct)
  • 109.5°

    • Which molecule has a trigonal planar shape?

    <p>BF3</p> Signup and view all the answers

    How does VSEPR theory explain molecular geometry?

    <p>By considering the number of lone pairs and atoms around the central atom</p> Signup and view all the answers

    Which molecule exhibits an octahedral shape?

    <p>SF6</p> Signup and view all the answers

    What does it mean for a molecule to have a net dipole?

    <p>The individual bond dipoles do not cancel each other out and create a positive and negative end.</p> Signup and view all the answers

    Which theory explains how atomic orbitals overlap to form a new orbital with a pair of opposite-spin electrons?

    <p>Valence Bonding Theory</p> Signup and view all the answers

    In Valence Bonding Theory, when does a covalent bond form?

    <p>When two atomic orbitals overlap and each has an unpaired electron.</p> Signup and view all the answers

    How can you determine if a molecule is polar or non-polar?

    <p>By considering the shape of the molecule and the type of bonds.</p> Signup and view all the answers

    What is the result when the sum of individual bond dipoles in a molecule is zero?

    <p>The molecule is non-polar.</p> Signup and view all the answers

    Which type of molecules can have polar bonds but still be non-polar overall?

    <p>Molecules with symmetric geometry.</p> Signup and view all the answers

    What is the purpose of VSEPR Theory?

    <p>To determine the shape of molecules based on minimizing repulsive forces</p> Signup and view all the answers

    How does sulfur hexafluoride (SF6) violate the octet rule?

    <p>By having more than 8 valence electrons</p> Signup and view all the answers

    In a coordinate covalent bond, where do the electrons involved in the bond come from?

    <p>Only one atom</p> Signup and view all the answers

    What is the general trend for following the octet rule among C, N, O, and F atoms?

    <p>All follow the octet rule consistently</p> Signup and view all the answers

    What type of bond occurs when S atoms exceed the octet rule by filling vacant nearby d orbitals?

    <p>Coordinate Covalent Bond</p> Signup and view all the answers

    What does Three-Dimensional Structure in chemistry refer to?

    <p>The shape of a molecule and how atoms are arranged in 3D space</p> Signup and view all the answers

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