periodic table of elements

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1234567891011121314151617181920
Across
  1. 3. an element repersented by one or two letters
  2. 5. a substance made of two or more elements together
  3. 7. the average mass of one atom of an element
  4. 9. a chemical reaction
  5. 11. consist of two or more substance in the same place
  6. 12. a characteristic that is observed when a substance changes into something else
  7. 13. the substance you start with in a chemical reaction
  8. 14. the form or apperance of a material but does not convert into a new substance
  9. 16. or family , elements in the same colum
  10. 18. organizes information about the elements
  11. 20. an element is the number of protons in the nucleus of an atom
Down
  1. 1. points to the substance you end up with
  2. 2. a substance that cannot change be broken down
  3. 4. shows the ratio of elements in the compound
  4. 6. a characteristic of a substance that can be observed without changing the substance into something else
  5. 8. the force that holds atoms together
  6. 10. a short simple way to describe chemical reaction
  7. 15. the smallest particle of an element
  8. 17. a particle made of two or more atoms
  9. 19. a row across the table