chemical reactions

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Across
  1. 3. device used for the elektrolysis of water
  2. 6. a reaction between a fuel and oxygen
  3. 7. smallest item with certain properties
  4. 12. breaking down a single substance into two or more
  5. 13. the metals in the first group of the periodic table
  6. 17. the eightteen columns in the peroidic table
  7. 20. rapid combustion, often creating large amount of heat
  8. 22. russian scholar who created the first orginisation system
  9. 23. decoposition by elektricity
  10. 24. decompostiion by light
Down
  1. 1. molecule consisting of a single type of atom
  2. 2. amount of a certain molecule in a reaction
  3. 4. when not enough oxygen is present during combustion
  4. 5. molecule consisting of multiple types of atom
  5. 8. decomposition by heat
  6. 9. when all fuel and oxygen is burnt
  7. 10. the gasses in the eightteenth group of the periodic table
  8. 11. suger used in your body as fuel
  9. 14. first element atomic number 1
  10. 15. substances comming out of a reaction
  11. 16. the non-scientific forerunner of chemistry
  12. 18. the seven rows in the periodic table
  13. 19. this number shows the amount of atoms in this molecule
  14. 21. substances going into a reaction