periodic table

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Across
  1. 3. located in the 17th group in the periodic table
  2. 5. period i am in
  3. 7. first group fourth period
  4. 12. metals that include iron, gold, and platinum
  5. 13. the first metals in the alkali metal familiy
  6. 14. element has 26 protons
  7. 15. has 2 protons
  8. 18. the center of the atom
  9. 20. every element in the second group
  10. 22. vertical columns on a periodic table
  11. 23. shows the amount of protons in the element
  12. 25. horizontal column on a periodic table
Down
  1. 1. has the atomic number of 15
  2. 2. belongs on the electron shell
  3. 4. the last group in the periodic table
  4. 6. a element that has only 2 protons
  5. 8. When elements are arranged in order of increasing atomic number, there is a periodic pattern in the properties
  6. 9. symbol in the periodic table is Au
  7. 10. the first scientist to organize the periodic table
  8. 11. the rings that surround the nucleus
  9. 16. last name of who created this crossword
  10. 17. has an atomic mass of 65.38
  11. 19. who was this cross word made by
  12. 21. has a atomic mass of 47.88
  13. 24. has 29 atomic number
  14. 26. symbol for lead