Periodic knowledge

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Across
  1. 2. has a atomic mass of 232.04
  2. 5. eu without periodic form
  3. 8. has a atomic mass of 247.07
  4. 10. it has a atomic number of 1 and I'd a noble gas
  5. 11. ca is the periodic form of what element?
  6. 14. Kr is the periodic form of what element?
  7. 16. has a atomic mass of 16.00 and is a noble gas
  8. 17. it's in the 18th groups and has a atomic number of 10
  9. 18. has a atomic number of 79
  10. 19. what is the non periodic form of ho?
  11. 21. has atomic number of 88
Down
  1. 1. it is a noble gas and has a atomic number of 6
  2. 3. has a atomic mass of 190.23
  3. 4. has a atomic number of 109
  4. 6. atomic number of 80
  5. 7. has a atomic mass of 183.94
  6. 9. what is fe in periodic form of what element?
  7. 12. has a atomic mass of 131.29
  8. 13. has a atomic number of 92
  9. 15. pb is the periodic for of what element?
  10. 20. io is what in periodic form of what element?