Chem Com - Irvin
Name ______________________
Cross Over Method: Writing Formulas for Ionic Compounds
Write correct chemical formulas for the following ionic compounds. Make sure the
overall charge equals zero. Use the list of ions and their charges on the back of
your study guide to determine charges of polyatomic ions an transition metals.
1. sodium chloride (sodium + chlorine)
2. calcium oxide (calcium + oxygen)
3. potassium hydroxide (potassium + hydroxide ion)
4. magnesium sulfide (magnesium + sulfur ion)
5. copper (II) carbonate (copper II ion + carbonate ion)
6. aluminum oxide (aluminum + oxygen)
7. iron (III) oxide (iron III + oxygen)
8. aluminum hydroxide (aluminum + hydroxide ion)
9. ammonium nitrate (ammonium ion + nitrate ion)
10. sodium carbonate (sodium + carbonate ion)
11. zinc nitrate (zinc + nitrate ion)
12. magnesium phosphate (magnesium + phosphate ion)