Periodic Table

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Across
  1. 2. added to toothpaste,______ helps to prevent tooth decay.
  2. 4. Keeps swimming pools clean and germ-free.
  3. 5. all living things, including diamonds and graphite, contain ______.
  4. 7. is a component of DNA and a growth promoter for plants.
  5. 10. abundant in water
  6. 11. found in proteins
  7. 14. Makes balloons float and your voice to sound ridiculously high.
  8. 15. a non metal and a halogen
  9. 16. Exudes a strong glow in flares and fireworks.
  10. 19. The main ingredient in table salt ______ is sodium.
  11. 20. batteries have ______, that has mood-stabilizing properties.
Down
  1. 1. is used to make computer chips and glass.
  2. 3. alkaline metal that is extremely radioactive
  3. 6. found in bananas
  4. 8. 21% of the air on Earth is ______, which is necessary for breathing.fluorine
  5. 9. a radioactive metal
  6. 12. In colored billboards, ______ glows electrically.
  7. 13. is an inert gas.
  8. 17. is a light metal found in soda cans and airplanes.
  9. 18. is used in matches and stinks.