key and sum chap 7
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Questions and Answers

What is the bond angle in a trigonal bipyramidal shape?

  • 90°
  • 120° (correct)
  • 180°
  • 109.5°

    • Which theory is used to predict bond angles based on positioning regions of high electron density as far apart as possible?

  • Born-Haber cycle
  • Octet rule
  • VSEPR theory (correct)
  • Inert pair effect

    • What property describes the separation of charge in a bond?

  • Bond energy
  • Bond dipole moment (correct)
  • Bond length
  • Lattice energy

    • What is the term for a covalent bond where electrons are shared unevenly between atoms?

    <p>Double bond</p> Signup and view all the answers

    What shape has six outside groups around a central atom in a three-dimensional arrangement?

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

    In a pure covalent bond, what happens to the shared electrons?

    <p>They are shared equally</p> Signup and view all the answers

    What determines how polar a bond will be between two atoms?

    <p>Difference in electronegativity</p> Signup and view all the answers

    What is the term used for an atom's ability to attract a pair of electrons in a chemical bond?

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

    Which type of molecules obey the octet rule for electron configuration?

    <p>Second row elements</p> Signup and view all the answers

    How is the strength of a covalent bond measured?

    <p>Bond dissociation energy</p> Signup and view all the answers

    What property of a molecule is described by the dipole moment?

    <p>Separation of charge</p> Signup and view all the answers

    What is the term for a molecule with an odd number of electrons that is considered unstable?

    <p>Free radical</p> Signup and view all the answers

    In the VSEPR theory, what does 'VSEPR' stand for?

    <p>Valence Shell Electron Pair Repulsion Theory</p> Signup and view all the answers

    What is the term for a covalent bond between atoms of different electronegativities?

    <p>Polar covalent bond</p> Signup and view all the answers

    Which shape involves a central atom with two pyramids above and below a square plane?

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

    What is the term used to describe the ability of an atom to attract a pair of electrons in a chemical bond?

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

    In a diatomic molecule of two identical atoms, how is the nature of the bond characterized?

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

    What is the preferred Lewis structure when assigning formal charges to atoms in a molecule?

    <p>One with formal charges as close to zero as possible</p> Signup and view all the answers

    How is the strength of a covalent bond measured?

    <p>By its bond dissociation energy</p> Signup and view all the answers

    What determines the three-dimensional arrangement of atoms in a molecule according to VSEPR theory?

    <p>Electron-pair geometry that minimizes repulsions</p> Signup and view all the answers

    What determines the strength of a covalent bond?

    <p>Electronegativity difference</p> Signup and view all the answers

    Which factor contributes to the lattice energy of an ionic compound?

    <p>Size of the ions</p> Signup and view all the answers

    What is the term for the average of the distribution of electrons indicated by different Lewis structures?

    <p>Resonance hybrid</p> Signup and view all the answers

    Which factor contributes to determining whether a bond is polar or nonpolar?

    <p>Difference in electronegativity</p> Signup and view all the answers

    In a Lewis structure, how are formal charges assigned to each atom?

    <p>By treating each bond as sharing one-half of the electrons with each atom</p> Signup and view all the answers

    What property of a molecule describes the separation of charge that depends on the difference in electronegativity and bond distance?

    <p>Dipole moment</p> Signup and view all the answers

    Which shape involves four outside groups placed around a central atom with 109.5° angles between each pair?

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

    In the context of Lewis structures, which term refers to the situation where one structure is insufficient to describe the bonding in a molecule?

    <p>Resonance form</p> Signup and view all the answers

    What theory predicts bond angles by positioning regions of high electron density as far apart as possible to minimize electrostatic repulsion?

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

    Which property of a covalent bond is represented by partial charges or a vector and is determined by the sum of the individual bond moments in a molecule?

    <p>Bond dipole moment</p> Signup and view all the answers

    What is the term for the average of the distribution of electrons indicated by different Lewis structures?

    <p>resonance hybrid</p> Signup and view all the answers

    How is the strength of a covalent bond measured?

    <p>bond dissociation energy</p> Signup and view all the answers

    In VSEPR theory, what is the term used to describe the three-dimensional arrangement of atoms in a molecule?

    <p>molecular structure</p> Signup and view all the answers

    What determines the strength of a covalent bond?

    <p>difference in electronegativity</p> Signup and view all the answers

    What is the term used for a molecule with an odd number of electrons that is considered unstable?

    <p>free radicals</p> Signup and view all the answers

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