Periodic Table Quiz

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Across
  1. 5. what element has the symbol "K"?
  2. 7. What element is found in DNA and bones?
  3. 9. What element do humans need to breathe?
  4. 11. What metal burns with a bright white flame?
  5. 17. What element is added to toothpaste to prevent cavities?
  6. 18. What gas is used in bright advertising signs?
  7. 19. What metal is used in rechargeable batteries?
  8. 20. What element is found in emeralds?
Down
  1. 1. What element has the symbol "Na"?
  2. 2. What noble gas is used in light bulbs?
  3. 3. What element has the symbol "B"?
  4. 4. What does "Si" mean on the periodic table?
  5. 6. What lightweight metal is used in soda cans?
  6. 8. What is the first element on the periodic table?
  7. 10. What gas makes up most of Earth's atmosphere?
  8. 12. What element smells like rotten eggs?
  9. 13. What element is found in diamonds and graphite?
  10. 14. What element keeps bones and teeth strong?
  11. 15. What element is used to disinfect swimming pools?
  12. 16. What gas is used to fill balloons so they float?