periodic table

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Across
  1. 2. Essential for plant growth.
  2. 4. The main element in sand and computer chips.
  3. 7. Essential for muscle function, found in bananas.
  4. 8. Used to clean swimming pools.
  5. 9. Key ingredient in table salt.
  6. 11. Found in gemstones like emeralds.
  7. 12. A noble gas in light bulbs.
  8. 13. Makes balloons float.
  9. 14. The lightest element, fuels the Sun.
  10. 15. Found in chlorophyll, helping plants grow.
  11. 18. Found in toothpaste for strong teeth.
Down
  1. 1. The backbone of life.
  2. 3. Builds strong bones and teeth.
  3. 5. Used in batteries.
  4. 6. Makes up most of the air we breathe.
  5. 7. Found in bones and DNA.
  6. 10. Used in cans and foil.
  7. 16. Smells like rotten eggs.
  8. 17. Lights up neon signs.
  9. 19. Keeps us alive with every breath.