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FCS Physics and Chemistry

Practice Writing Formulas
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Write the formulas for the compounds formed when these elements combine. Do not look at the answers (located at bottom of page) before you have written all the formulas. If one of your formulas differs from the answer, try to find out why. If you have questions, ask Mr. O. 

  1. hydrogen and oxygen
  2. sodium and chlorine
  3. chlorine and magnesium
  4. potassium and sulfur
  5. aluminum and oxygen
  6. gold and fluorine
  7. iodine and hydrogen
  8. phosphorus and silver
  9. phosphorus and aluminum
  10. sulfur and silver
  11. oxygen and uranium
  12. tin (IV) and oxygen
  13. iron (III) and oxygen
  14. copper (I) and chlorine
  15. copper (II) and chlorine


Forestville Central School
4 Academy Street
Forestville, NY 14062