Exploring Covalent Bonds
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Questions and Answers

What is the main compound found in sand?

  • Silicon monoxide
  • Silicon dioxide (correct)
  • Silicon nitride
  • Silicon carbide

    • What type of structure does silica (silicon dioxide) have?

  • Giant ionic structure
  • Metallic structure
  • Simple molecular structure
  • Giant covalent structure (correct)

    • Why do substances with giant covalent structures have high melting and boiling points?

  • They contain charged particles
  • They have weak intermolecular forces
  • They have weak covalent bonds
  • They have strong covalent bonds (correct)

    • Which substance is an exception and can conduct electricity among substances with giant covalent structures?

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

    According to Coulomb's law, the electrostatic forces holding a salt C+A− together are roughly how many times weaker than C2+A2−?

    <p>Four times weaker</p> Signup and view all the answers

    How is the lattice energy of a solid crystalline ionic compound calculated using the Born–Landé equation?

    <p>As the sum of the electrostatic potential energy and a short-range attractive potential energy term</p> Signup and view all the answers

    According to Coulomb's law, the electrostatic forces holding a salt C+A− together are roughly how many times weaker than C2+A2−?

    <p>4</p> Signup and view all the answers

    What are the two principal factors in determining the form of the lattice in ionic compounds?

    <p>Relative charges of the ions and their relative sizes</p> Signup and view all the answers

    What term is used to describe the enthalpy change in forming a solid crystalline ionic compound from gaseous ions?

    <p>Lattice energy</p> Signup and view all the answers

    Which equation can be used to calculate the lattice energy of an ionic compound?

    <p>Born–Landé equation</p> Signup and view all the answers

    What effect is summarized by Fajans' rules in crystal lattices of purely ionic compounds?

    <p>Polarization power effect</p> Signup and view all the answers

    According to Coulomb's law, the electrostatic forces holding a salt C+A− together are roughly how many times weaker than C2+A2−?

    <p>4 times weaker</p> Signup and view all the answers

    What is the term used to describe the enthalpy change in forming a solid crystalline ionic compound from gaseous ions?

    <p>Lattice energy</p> Signup and view all the answers

    Which equation can be used to calculate the lattice energy of an ionic compound?

    <p>Born–Landé equation</p> Signup and view all the answers

    What effect is summarized by Fajans' rules in crystal lattices of purely ionic compounds?

    <p>Partial covalency effect</p> Signup and view all the answers

    What is the main difference between ionic bonding and covalent bonding?

    <p>Ionic bonding follows maximum packing rules, while covalent bonding follows VSEPR rules.</p> Signup and view all the answers

    According to Coulomb's law, the electrostatic forces holding a salt C+A− together are roughly how many times weaker than C2+A2−?

    <p>4</p> Signup and view all the answers

    What is the term used to describe the enthalpy change in forming a solid crystalline ionic compound from gaseous ions?

    <p>Lattice energy</p> Signup and view all the answers

    What effect is summarized by Fajans' rules in crystal lattices of purely ionic compounds?

    <p>Polarization power effect</p> Signup and view all the answers

    What type of structure does silica (silicon dioxide) have?

    <p>Covalent lattice</p> Signup and view all the answers

    What are the two principal factors in determining the form of the lattice in ionic compounds?

    <p>Relative charges of the ions and their relative sizes</p> Signup and view all the answers

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