Unit 2: Electronegativity and Bonding
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Questions and Answers

What does electronegativity measure in an atom?

  • The atomic mass of the atom
  • The number of electrons in the outer shell
  • The attraction for electrons in a bond (correct)
  • The number of protons in the nucleus
  • Based on electronegativity difference, what type of bond is indicated when the value is zero?

  • Ionic bond
  • Nonpolar covalent bond (correct)
  • Polar covalent bond
  • Metallic bond
  • If the electronegativity difference between two atoms is 2.5, what type of bond is likely formed?

  • Ionic bond (correct)
  • Metallic bond
  • Nonpolar covalent bond
  • Polar covalent bond
  • In the pair of atoms Sn - Cl, what type of bond would you expect based on their electronegativities?

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

    When Ga and As are bonded, what type of bond is formed considering their electronegativities?

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

    What type of bond is expected between Se and S based on their electronegativity values?

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

    What happens to the bond length as the percent s-character in a hybrid orbital increases?

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

    In a hybrid orbital with 25% s-character, how many hybrid orbitals are formed from one 2s orbital?

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

    According to the explanation, which type of hybrid orbital has the highest bond strength?

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

    Which bond is indicated as the longest C-C single bond in compound A?

    <p>H C C CH2 C C C</p> Signup and view all the answers

    Why are bond (1) and bond (2) different in length, even though they are both C-C single bonds?

    <p>Varying % s-character</p> Signup and view all the answers

    What defines a bond as polar covalent according to the text?

    <p>UNEQUAL sharing of electrons</p> Signup and view all the answers

    Which element in a molecule is typically the central atom?

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

    What do the symbols δ+ and δ– represent in a bond?

    <p>Unequal sharing of electron density</p> Signup and view all the answers

    How can you determine if a molecule has a net dipole moment?

    <p>By analyzing the individual bond dipoles and their directions</p> Signup and view all the answers

    Which element is commonly found in multiple bonds due to its ability to form stable double or triple bonds?

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

    What is the significance of the head and tail arrow notation in indicating polarity?

    <p>Points towards the more electronegative element</p> Signup and view all the answers

    In a molecule, how is the geometry around individual atoms important for determining net dipoles?

    <p>It determines if individual dipoles cancel or reinforce each other</p> Signup and view all the answers

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