chemistry crossword

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Across
  1. 1. what is the name of the table of elements
  2. 5. what is a pure substance
  3. 6. What group is the noble gases
  4. 7. type of between a metal and a non-metal
  5. 9. what ion does oxygen form
  6. 10. What are the columns called on the table of elements
  7. 12. what are the elements called in the middle of the table of elements
  8. 15. what is multiple differant compounds in one place
  9. 16. what structure do covalent bonds make
  10. 17. giant ionic ..........
  11. 18. acronym for metalic bonding
  12. 20. what connects atoms
  13. 22. what did neils bohr descover about electrons
  14. 23. What group is francium in
Down
  1. 2. what forces hold together molecules
  2. 3. what do the dots represent in a dot and cross diagram
  3. 4. What are the rows called on the table of elements
  4. 8. bonding between non-metals
  5. 11. what structure is diamond
  6. 13. things electons sit on
  7. 14. what is rutherford's model called
  8. 15. What is mass / relative atomic mass
  9. 19. What group is the Halogens
  10. 21. What is the chemical formula for francium fluoride