The 20 Elements

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Across
  1. 3. Light it and the fire is eco-friendly(sort-of)!
  2. 5. The sun.
  3. 7. Shiny as diamond, fragile as ceramics.
  4. 8. 80's colorful signs on the streets.
  5. 9. What is that "1,000,000 Banana Challenge" going to do to you?
  6. 11. Batteries for electric cars.
  7. 13. Villagers' currency.
  8. 14. Everywhere you go, there is always it roaming around.
  9. 15. Whiter teeth!
  10. 16. Cans. Just cans.
  11. 17. Stronger bone!
Down
  1. 1. Can be compared to a quiet kid.
  2. 2. Glows but without fluoride.
  3. 4. The precious need it to exist.
  4. 5. Think of balloons.
  5. 6. Use to clean pool, but toxic in the air.
  6. 7. Add chlorine and it turns into seasons!
  7. 10. Basically every life's needs.
  8. 12. Sparkles!