Element Puzzle

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Across
  1. 2. Lightweight metal in aerospace materials
  2. 3. Yellow nonmetal, smells like rotten eggs
  3. 4. Lightweight metal used in cans
  4. 6. Glows red-orange in signs
  5. 8. Used to disinfect swimming pools
  6. 10. Found in matches and DNA
  7. 13. Reactive metal in table salt
  8. 14. Burns bright white, used in fireworks
  9. 15. Essential for breathing in humans
  10. 16. Builds strong bones and teeth
  11. 18. Makes up 78% of Earth’s atmosphere
  12. 19. Used in computer chips and sand
Down
  1. 1. Gas used in balloons
  2. 2. Element used in borax and detergents
  3. 5. Essential mineral, found in bananas
  4. 7. Added to toothpaste, very reactive gas
  5. 9. Inert gas in light bulbs
  6. 11. Lightest element, most abundant in the universe
  7. 12. Light metal used in batteries
  8. 17. Basis of all known life