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Properties of Simple Molecular Covalent Substances
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Properties of Simple Molecular Covalent Substances

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Questions and Answers

What is the primary reason for the low melting and boiling points of simple molecular covalent substances?

  • The molecules are highly electronegative.
  • The molecules are composed of atoms with high atomic masses.
  • The weak intermolecular forces of attraction between the molecules are easily overcome. (correct)
  • The strong covalent bonds between the molecules are broken.

    • What is the relationship between the relative atomic/molecular mass and the weak intermolecular forces of attraction?

  • The relative atomic/molecular mass affects the covalent bonds between the atoms.
  • The relative atomic/molecular mass has no effect on the intermolecular forces of attraction.
  • The greater the relative atomic/molecular mass, the weaker the intermolecular forces of attraction.
  • The greater the relative atomic/molecular mass, the stronger the intermolecular forces of attraction. (correct)

    • What type of bond is formed when a metal and a nonmetal interact?

  • Hydrogen bond
  • Electrostatic bond
  • Covalent bond
  • Ionic bond (correct)

    • What is the term for a positively charged ion?

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

    What occurs when atoms gain or lose electrons in ionic bonding?

    <p>They become ions</p> Signup and view all the answers

    What is the reason for the higher melting points of longer simple covalent molecules?

    <p>The molecules have more atoms, resulting in more weak intermolecular forces of attraction</p> Signup and view all the answers

    What is the charge of an atom when it gains an electron?

    <p>-1</p> Signup and view all the answers

    Why do elements in group 1 lose their one outer shell electron to become + cations?

    <p>It's easier to lose 1 electron</p> Signup and view all the answers

    What is the formula for the ionic compound calcium oxide?

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

    Why do ionic compounds have high melting and boiling points?

    <p>Because they have strong electrostatic forces of attraction</p> Signup and view all the answers

    What is the charge of the ion formed by an element in group 3?

    <p>3+</p> Signup and view all the answers

    What is the function of the electron in the formation of an ionic compound?

    <p>It is gained by the anion and lost by the cation</p> Signup and view all the answers

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