Chemistry crossword

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Across
  1. 4. is copper sulphate a compound or a element
  2. 5. what is the least reactive metal
  3. 6. is gold a element or a compound
  4. 8. is magnesium more reactive then gold
  5. 10. Witch one is more reactive Zinc or Aluminum
  6. 12. What is the most reactive metal
  7. 15. what is the second least reactive metal
Down
  1. 1. what was found first calcium or copper
  2. 2. what does Copper + Tin make
  3. 3. what react with potassium to make it explode
  4. 5. what was invented first magnesium or gold
  5. 7. What is the forth most reactive metal
  6. 9. what does copper + oxygen make
  7. 11. what was invented first copper or calcium
  8. 13. what is the second most reactive metal
  9. 14. what is the third most reactive metal