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 (D)</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 (A)</p> Signup and view all the answers

Which molecule exhibits an octahedral shape?

<p>SF6 (B)</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. (A)</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 (D)</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. (D)</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. (A)</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. (B)</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. (A)</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 (D)</p> Signup and view all the answers

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

<p>By having more than 8 valence electrons (A)</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 (B)</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 (D)</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 (C)</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 (B)</p> Signup and view all the answers

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