Chemistry Unit

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Across
  1. 2. any combination of two or more elements
  2. 5. the mass of the products in a chemical reaction must equal the mass of the reactants
  3. 9. below the element symbol
  4. 11. absorbs energy
  5. 13. path taken by electrons
  6. 14. energy released as heat
  7. 15. example:Hydrogen
  8. 16. example:Calcium
  9. 17. example:Boron
  10. 18. positive part in the nucleus
  11. 21. 2,8,8,2
  12. 24. the middle of an atom
  13. 25. elements from top to bottom
Down
  1. 1. what was put into a chemical reaction
  2. 3. any combination of elements
  3. 4. creator of Peroidic Table
  4. 6. number of electrons
  5. 7. farthest electron from the middle
  6. 8. what represents an atom
  7. 10. makes everything
  8. 12. example:Helium
  9. 18. elements from left to right
  10. 19. formed by a chemical reaction
  11. 20. makes up the Periodic Table
  12. 22. neutral part in the nucleus
  13. 23. fast and slow______.