Periodic table puzzle-Aubrey

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Across
  1. 3. I have 29 protons
  2. 6. As
  3. 9. My atomic number is 36
  4. 11. My atomic number is 47
  5. 12. I have 2 electrons
  6. 14. My atomic number is 79
  7. 15. (17,3)
  8. 19. I'm in group 1 period 4
  9. 21. Ar
  10. 22. My atomic mass is 200.59
  11. 23. I have 10 neutrons in group 18
Down
  1. 1. Ni
  2. 2. I am a halogen in period 4
  3. 4. (2,6)
  4. 5. I have 8 neutrons in group 16
  5. 7. I have 12 protons in group 2
  6. 8. (12,4)
  7. 10. P
  8. 11. Na
  9. 13. In
  10. 16. I have 1 proton
  11. 17. (14,3)
  12. 18. I have 20 neutrons in group 2
  13. 20. I'm a non metal in group 13