Atomic structure and periodic table practice!

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Across
  1. 4. My average atomic mass is equal to 200.592
  2. 6. I have a mass of 11 and 6 neutrons, who am I?
  3. 7. My atomic number is 100 and I have a mass of 257!
  4. 10. I have 61 neutrons and 47 protons, who am I?
  5. 12. My chemical symbol is Sn!
  6. 13. My chemical symbol is Sb.
  7. 15. I have 20 neutrons and 20 protons!
  8. 18. My average atomic mass is 208.980, who am !?
  9. 19. I have 25 electrons and 30 neutrons, who am !?
  10. 21. I have 138 neutrons and a mass of 226, what element am I?
  11. 26. I have 74 neutrons and a mass of 127, who am I?
  12. 27. I am very abundant on earth, my atomic number is 7.
  13. 30. I have a chemical symbol, Fe.
  14. 31. My atomic number is 92.
  15. 32. I am represented by the letter, K.
Down
  1. 1. I have 65 positive particles in my nucleus!
  2. 2. My atomic symbol is Pu, who am I?
  3. 3. I have 31 positive subatomic particles in my nucleus.
  4. 5. I have 76 positive protons.
  5. 8. I have 88 as my atomic number.
  6. 9. I have 78 negative subatomic particles, who am I?
  7. 11. I have a mass of 52 and 29 Neutrons, who am I?
  8. 14. My chemical symbol is a W.
  9. 16. I have 29 electrons and I am a neutral atom, NOT an ion!
  10. 17. I have 35 neutrons and 30 protons, who am I?
  11. 20. As a neutral atom I have 13 electrons.
  12. 22. I have 104 protons.
  13. 23. People like to use me for jewelry and my average atomic mass is 196.967.
  14. 24. My atomic number is 10, who am I?
  15. 25. I have a mass of 131 and 77 neutrons!
  16. 28. My chemical symbol is Ba!
  17. 29. My atomic number and mass number are the same… (1)!