Covalent Compounds: Session 4 - Covalent Bonding
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Questions and Answers

What is electronegativity a measure of?

  • The attraction of an atom for electrons in a bond (correct)
  • The number of electrons in an atom
  • The size of an atom
  • The ability of an atom to form an ionic bond

    • In a polar covalent bond, electrons are pulled towards which type of element?

  • The element with greater electronegativity (correct)
  • Neither of the elements
  • Both elements equally
  • The element with lesser electronegativity

    • When do atoms form a nonpolar bond?

  • When the electrons are shared unequally between the two atoms
  • When both atoms have different electronegativities
  • When the electronegativities of the two atoms are equal or similar (correct)
  • When the bond is ionic

    • What is indicated by the symbol δ+ in a bond?

    <p>Electrons are pulled away from the atom</p> Signup and view all the answers

    How is the polarity of a molecule determined?

    <p>By the polarity of the individual bonds and the molecular shape</p> Signup and view all the answers

    What is a common characteristic of nonpolar molecules?

    <p>Individual bond dipoles that do not cancel</p> Signup and view all the answers

    What is the number of electrons in a triple bond?

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

    Which element needs only two electrons in bonding?

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

    What is the purpose of resonance structures?

    <p>To spread out lone pairs and electron pairs in multiple bonds</p> Signup and view all the answers

    What is the term for the theory used to determine the shape around a given atom?

    <p>VSEPR Theory</p> Signup and view all the answers

    What happens when drawing Lewis structures for polyatomic ions?

    <p>Add one electron for each negative charge and subtract one electron for each positive charge</p> Signup and view all the answers

    Which elements have empty d orbitals available to accept electrons?

    <p>Elements in the third row</p> Signup and view all the answers

    What happens when two nonmetals combine or a metalloid bonds to a nonmetal?

    <p>A covalent bond is formed</p> Signup and view all the answers

    What is a molecule?

    <p>A discrete group of atoms held together by covalent bonds</p> Signup and view all the answers

    What is the main purpose of drawing a Lewis structure?

    <p>To show the location of all valence electrons in a molecule</p> Signup and view all the answers

    What happens when a lone pair of electrons is converted into a bonding pair?

    <p>One bonding pair of electrons is formed for each 2 e− needed to complete an octet</p> Signup and view all the answers

    What is the number of electrons that hydrogen shares?

    <p>2</p> Signup and view all the answers

    What is the goal of atoms in forming covalent bonds?

    <p>To share electrons to attain the electronic configuration of the noble gas closest to them</p> Signup and view all the answers

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