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Chemistry I - Chapter 8

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  • Unequal sharing of electrons between two atoms creates a _____ bond.
    polar
  • True or False: Molecules with only polar bonds must be polar as well.
    true
    false
  • If the electronegativities differ from __ to __, the bond is nonpolar covalent.
    0 to 0.4
  • Which element is always the terminal atom in a molecule?
    hydrogen
  • Name this formula: CO2
    carbon dioxide
  • The second element in the formula of a binary compound has the suffix ____.
    -ide
  • ________ molecules include elements such as hydrogen, nitrogen, and oxygen.
    diatomic
  • Electronegativity _________ as you move down and to the left on the periodic table.
    decreases
  • Adding a pi bond to a sigma bond makes the overall bond between two atoms...
    shorter
    longer
    more flexible
  • Electronegativity _________ as you move up and to the right on the periodic table.
    increases
  • In what form do elements such as hydrogen, nitrogen, and oxygen normally occur?
    as molecules containing three atoms
    as single atoms
    as molecules containing two atoms
    as molecules containing four atoms
  • More than one pair of electrons shared between two atoms is called a _____ bond.
    pi
  • True or False: Nonpolar compounds can dissolve in polar substances.
    false
    true
  • What type of compounds are soluble in nonpolar substances?
    nonpolar
  • When naming the first element in a formula, you do not use the prefix _____.
    mono-
  • True or False: The bond between atoms is stronger than the bond between molecules.
    true
    false
  • If the electronegativities differ from __ to __, the bond is ionic.
    1.7 to 3+
  • Name this formula: ClF3
    chlorine trifluoride
  • Which element has the highest electronegativity?
    fluorine
  • Name this formula: N2O2
    dinitrogen dioxide
  • Covalent bonds typically occur between a nonmetal and a ________.
    nonmetal
  • When electrons are shared, the attachment between atoms is called a ________ ____.
    covalent bond
  • An acid with an oxyanion ending in -ate turns into an -____ acid.
    -ic
  • Name this formula: PCl5
    phosphorous pentachloride
  • Name this formula: SF6
    sulfur hexafluoride
  • The ________ the bond, the stronger the bond.
    shorter
    longer
  • An acid with an oxyanion ending in -ite turns into an -____ acid.
    -ous
  • True or False: Ionic compounds can dissolve in polar substances.
    false
    true
  • Which family has no electronegativity?
    noble gases
  • ____________ is the tendency of an atom to attract electrons.
    electronegativity
  • The prefix ____ means one.
    mono-
  • The Greek letter _____ represents a partial charge on an atom.
    delta
  • What type of compounds are soluble in water?
    polar and ionic
  • A polar molecule must have a ________ and a ________ side.
    positive and negative
  • Name this formula: CO
    carbon monoxide
  • When a bond breaks, the energy is released. This is called a(n) __________ reaction.
    exothermic
  • Equal sharing of electrons between two atoms creates a _____ bond.
    nonpolar
  • The prefix ____ means nine.
    nona-
  • A ______ acid only contains two elements.
    binary
  • When two or more atoms bond by sharing electrons, the product is called a ________.
    molecule
  • If the electronegativities differ from __ to __, the bond is polar covalent.
    0.4 to 1.7
  • True or False: Molecules with only nonpolar bonds must be nonpolar as well.
    true
    false
  • One pair of electrons shared between two atoms is called a _____ bond.
    sigma
  • The prefix ____ means four.
    tetra-
  • _________ structures are two or more valid Lewis structures for one molecule.
    resonance
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