periodic table

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1234567891011121314151617181920
Across
  1. 2. we need this to survive
  2. 4. third on the periodic table
  3. 6. symbol is Na
  4. 10. symbol is K
  5. 12. symbol is C
  6. 13. symbol is Ne
  7. 14. symbol is Al
  8. 17. the symbol is He
  9. 18. 20th on the periodic table
  10. 20. first on the periodic table
Down
  1. 1. symbol is P
  2. 3. after carbon
  3. 5. symbol is Si
  4. 7. Symbol is Mg
  5. 8. symbol is F
  6. 9. symbol is B
  7. 11. symbol is Be
  8. 15. in pools
  9. 16. symbol is S
  10. 19. symbol is Ar