periodic table

1234567891011121314151617181920
Across
  1. 2. liquid at room temperature
  2. 4. Makes up about 21% of our air
  3. 7. highly radioactive transactinide element
  4. 11. The most reactive element
  5. 13. compresses
  6. 14. atomic number 30
  7. 15. brittle
  8. 16. atomic number 31
  9. 17. has cooling power
  10. 20. silvery white
Down
  1. 1. It has the highest melting point
  2. 3. most abundant element
  3. 5. is light weight,steel-gray
  4. 6. very light
  5. 8. the heaviest known element
  6. 9. One of the only two metals that aren't silver-colored
  7. 10. As strong as steel
  8. 12. first artificially produced element
  9. 18. rarest naturally occurring element
  10. 19. It can form over 10 million different compounds