Chemistry Crossword

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Across
  1. 2. organic Catalyst
  2. 4. most reactive non metal
  3. 7. this elements symbol is K
  4. 10. a new substance after a chemical change is called a...
  5. 12. a compound made of 1 non metal and 1 metal
  6. 14. a subatomic particle with a negative charge
  7. 15. Most reactive metal especially in air and water
  8. 16. this elements symbol is O
  9. 17. The horizontal category on the Periodic table (7 of them)
  10. 18. a chart that groups all the elements in the world
  11. 21. This elements symbol is H
  12. 22. the substances you combine to create a chemical change are called...
  13. 24. This elements symbol is Na
Down
  1. 1. often a liquid or gas at room temperature
  2. 3. The vertical category on the periodic table (18 of Them)
  3. 5. a cemical reaction that absorbs heat
  4. 6. a subatomic particle with no charge
  5. 8. a compound made of 2 non metals
  6. 9. The most stable and unreactive (gas)
  7. 11. the average mass of an element
  8. 13. in between a metal and non metal
  9. 17. a subatomic particle with a positive charge
  10. 19. the number that shows how many electrons and proton is in a element
  11. 20. a chemical reaction that releases heat
  12. 23. This elements symbol is Au