Chapter 2 Review: 19626/5024318

  1. An element's number of protons plus neutrons make up its ________ number.
    1. mass <==== correct
    2. atomic (wrong)
    3. ionic (wrong)
    4. valence (wrong)
    5. nuclear (wrong)
      Hint
  2. Ionic compounds such as sodium chloride may form
    1. covalent bonds. (wrong)
    2. hydrogen bonds. (wrong)
    3. double bonds. (wrong)
    4. isotopes. (wrong)
    5. crystals. <==== correct
      Hint
  3. In a ________ bond the atoms have different electronegativities and share the electrons unequally.
    1. polar covalent <==== correct
    2. ionic (wrong)
    3. hydrogen (wrong)
    4. nuclear (wrong)
    5. savings (wrong)
      Hint
  4. The four most common elements of living matter include the following EXCEPT:
    1. carbon (C) (wrong)
    2. hydrogen (H) (wrong)
    3. potassium (K) <==== correct
    4. nitrogen (N) (wrong)
    5. oxygen (O) (wrong)
      Hint
  5. The attraction between the partial positive charge on the hydrogen atom of water and the partial negative charge on the nitrogen atom of ammonia is
    1. covalent bond. (wrong)
    2. ionic bond. (wrong)
    3. hydrogen bond. <==== correct
    4. crystal bond. (wrong)
    5. maternal bond. (wrong)
      Hint
  6. What is the atomic number of the cation formed in the reaction at right?
    1. 1 (wrong)
    2. 10 (wrong)
    3. 11 <==== correct
    4. 16 (wrong)
    5. 17 (wrong)
      Hint
  7. The 2nd and 3rd electron shells can contain up to ________ and ________ electrons, respectively.
    1. 1, 2 (wrong)
    2. 1, 4 (wrong)
    3. 2, 4 (wrong)
    4. 2, 8 (wrong)
    5. 8, 8 <==== correct
      Hint