Chemical Formula Assignment     Name _______________________________

  1. Metals generally have an oxidation number with a __________________ charge.
     
  2. Nonmetals generally have an oxidation number with a _________________ charge.
     
  3. The oxidation number of an ion is equal to its ________________________.
     
  4. Give the sum of the oxidation numbers in each of the following chemical formulas:
    a. H2SO4
     
    b. C6H12O6
     
    c. NH4+
     
    d. Cr2O7−2     		_____________________
     
    _____________________
     
    _____________________
     
    _____________________
  5. Write the correct chemical formula for each of the following combinations:
    a. magnesium and nitrogen _____________________
    b. iron (III) and oxygen _____________________
    c. sodium and sulfur _____________________
    d. copper (II) and chlorine _____________________
    f. aluminum and nitrogen _____________________
    g. mercury (II) and phosphorus _____________________
    h. lead (II) and iodine _____________________
    i. potassium and carbon _____________________
    j. calcium and fluorine _____________________
    k. hydrogen and cyanide _____________________
    l. aluminum and sulfate _____________________
    m. ammonium and phosphate _____________________
    n. hydrogen and peroxide _____________________