Periodic Table Of Elements; Crossword Puzzle

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Across
  1. 2. Has 9 protons
  2. 4. Has an average atomic mass of 30.9737
  3. 6. Has an average atomic mass of 101.07
  4. 11. Has 25 protons
  5. 12. What element is in group 17 and in period 4
  6. 14. The horizontal line's on the periodic table
  7. 16. Group 4 period 5
  8. 18. has 14 protons
  9. 19. Group 18 period 3
Down
  1. 1. Has 5 protons
  2. 3. Has 3 protons
  3. 4. What the element "K" stands for
  4. 5. Group 1 period 3
  5. 7. period 18
  6. 8. What element is in group 14 and also in period 2
  7. 9. What does the element "Mg" stand for
  8. 10. Has 31 protons
  9. 13. Has and average atomic mass of about 16
  10. 15. The vertical lines on the periodic table
  11. 16. Has 30 protons
  12. 17. Has an average mass of about 45