Periodic table

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1234567891011121314151617181920212223
Across
  1. 2. a red/brown metal used for pennies
  2. 4. 136+86= the atomic mass
  3. 6. a chemical element used as an anti-rust coat
  4. 10. 90
  5. 11. can be found in old glass
  6. 13. fourth in group one
  7. 16. the abbreviation is the opposite of yes
  8. 18. used to make ballons float
  9. 19. the symbol is the abbreviation for for real
  10. 20. 3rd in the second row
  11. 21. the abbreviation for agriculture
  12. 23. The celsius boiling temperature
Down
  1. 1. element starts with P, not K
  2. 3. 31-15=16
  3. 5. second element in group one
  4. 7. hard silvery-white metal
  5. 8. My atomic number is two 5's
  6. 9. hard silver transition metal
  7. 12. I have 13 x 2 electrons
  8. 14. four letter word and used for jewlery
  9. 15. 28.085-14 is the equation
  10. 17. used to clean cattle udders
  11. 18. My atomic number is the simplest
  12. 22. the NAMAN answer is 114