Periodic Table of Elements

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Across
  1. 2. atomic number 20
  2. 4. my symbol is N
  3. 6. an element that has properties of both metals and nonmetals
  4. 7. best science teacher ever
  5. 11. group 17
  6. 12. the positively charged dense center of an atom
  7. 16. this particle has no charge
  8. 17. my atomic number is 79
  9. 19. same number of protons and electrons
  10. 20. small particles that make up most of matter
  11. 21. you find this number by subtracting the atomic number from the atomic mass
  12. 23. my symbol is Ar
  13. 25. most of the elements
  14. 26. each row in periodic table
  15. 28. 2nd element on the periodic table
  16. 29. another name for group
Down
  1. 1. my atomic number is 79
  2. 3. I have 26 protons
  3. 5. these types of metals are found in the middle of the periodic table
  4. 6. symbol for Magnesium
  5. 8. 1st element on the periodic table
  6. 9. group 2 on the periodic table
  7. 10. ordered the periodic table based on increasing atomic number
  8. 13. #6 on the periodic table
  9. 14. my symbol is Ag
  10. 15. my symbol is K
  11. 17. each column in the periodic table
  12. 18. discovered the neutron
  13. 22. gases group 18
  14. 24. my atomic mass is 35.453
  15. 27. I have 20 neutrons and am found in your teeth and bones