First 20 Elements of the Periodic Table

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Across
  1. 2. this gas is needed for life processes
  2. 3. element number 4 in the Periodic Table
  3. 5. used to clean pools and floors
  4. 7. makes up most of the atmosphere
  5. 9. used to make planes and foil
  6. 10. Na na na na na!
  7. 12. the lightest element
  8. 14. this exists in a white and a red form
  9. 16. needed for strong bones and teeth
  10. 17. the third element in the Periodic Table
Down
  1. 1. used to fill gas balloons
  2. 3. this element sounds like the word "boring"
  3. 4. an element found in sand
  4. 6. this gas is used to make glowing signs
  5. 8. found in toothpaste
  6. 9. another inert gas, the 18th element
  7. 11. element number 12 in the Periodic Table
  8. 13. found in bananas
  9. 15. yellow element with a strong smell
  10. 16. this element makes up diamonds and graphite