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