Elements puzzle

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Across
  1. 3. My chemical symbol is Pb
  2. 6. the mass of an atom
  3. 11. You breathe me every day
  4. 12. I have 80 electrons
  5. 13. I am a column full of chemical elements
  6. 14. I am in group 13 period 4
  7. 17. I have 54 electrons
  8. 18. My atomic number is 88
  9. 19. I am in period 7 group 5
  10. 21. I have 136 neutrons and I live in group 18
  11. 23. I have 35 electrons
  12. 24. I can be known for being in a banana
Down
  1. 1. I make your bones strong
  2. 2. I have 10 neutrons and live in group 17
  3. 4. the number of protons in the nucleus of an atom
  4. 5. I have 159 neutrons and live in group 17
  5. 7. I am in period 5 group 11
  6. 8. I have 0 neutrons and I live in period 1
  7. 9. My chemical symbol is W
  8. 10. A penny is made of me
  9. 15. I am a row of chemical elements
  10. 16. My chemical symbol is Au
  11. 20. My chemical symbol is U
  12. 22. I am in period 2 group 18