Chemistry crossword

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Across
  1. 4. what is the least reactive metal
  2. 5. what was invented first magnesium or gold
  3. 7. What is the most reactive metal
  4. 10. what was found first calcium or copper
  5. 12. what does copper + oxygen make
  6. 14. what is the second least reactive metal
Down
  1. 1. What is the forth most reactive metal
  2. 2. what is the third most reactive metal
  3. 3. is copper sulphate a compound or a element
  4. 6. Is zinc more reactive then aluminum
  5. 8. what is the second most reactive metal
  6. 9. what does Copper + Tin make
  7. 11. is magnesium more reactive then gold
  8. 12. what was invented first copper or calcium
  9. 13. is gold a element or a compound