Periodic Elements

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Across
  1. 2. most commonly used to make jewelry
  2. 4. liquid named after a planet
  3. 6. noble gas with 18 protons
  4. 7. element in period 5 group 14
  5. 8. equals 5 cents
  6. 10. atomic mass of 108
  7. 11. named after France
  8. 13. alkaline earth metal in period 6
  9. 14. named after Europe
  10. 15. Used to make bright signs
  11. 16. gas with the atomic mass of 1
  12. 18. heaviest element
  13. 19. element names after america
Down
  1. 1. named after the university of california
  2. 3. used for breathing
  3. 5. elements name for "K"
  4. 6. atomic number of 13
  5. 9. commonly used to write with
  6. 12. named after California
  7. 17. element that is 10 times the mass of helium