Chapter 2:

  1. The most common elements of living matter include the following EXCEPT:
    1. carbon (C)
    2. hydrogen (H)
    3. potassium (K)
    4. oxygen (O)
    5. nitrogen (N)
  2. In a ________ bond the atoms have different electronegativities and share the electrons unequally.
    1. polar covalent
    2. ionic
    3. hydrogen
    4. nuclear
    5. savings
  3. Ionic compounds, which may form crystals, are often called
    1. fats.
    2. lipids.
    3. glass.
    4. sugars.
    5. salts.
  4. What is the atomic number of the cation formed in the reaction at right?
    1. 1
    2. 10
    3. 11
    4. 16
    5. 17