Presley's Periodic Table Crossword puzzle

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Across
  1. 2. You can find in dairy foods, bread, and meat.
  2. 6. A hard silver metal used in strong alloys.
  3. 8. A soft metal often found in bananas and fish.
  4. 13. My atomic symbol is Hg
  5. 15. A yellow precious metal, used a lot in jewelry.
  6. 16. My atomic symbol is I.
  7. 18. You fill balloons with this for them to rise.
  8. 20. Used in electric signs.
Down
  1. 1. A silvery metal used in laboratory equipment.
  2. 3. Highest weight of natural appearing elements.
  3. 4. Number 94 on the periodic table.
  4. 5. Number 29 on the periodic table.
  5. 7. The most rarely occurring element.
  6. 9. You need to breath to survive.
  7. 10. The first gas found to form chemical compounds.
  8. 11. Named for unique blue lines of it's spectrum.
  9. 12. A naturally occurring radioactive metal.
  10. 14. The lightest member of the halogen elements.
  11. 17. A cheap commonly used metal in tools and more.
  12. 19. Tarnishes to a gray color when exposed to air.