Across
- 1. Used to prevent rust
- 4. Has a strong smell
- 5. Valuable yellow metal
- 7. Found in blood and steel
- 10. Burns with a bright white flame
- 11. Found in batteries
- 12. Strengthens bones
- 15. Found in matches
- 16. Used in bright signs
- 17. Found in bananas
- 19. Noble gas in light bulbs
- 21. Liquid metal
Down
- 2. Used in pools
- 3. Used in balloons
- 6. Found in table salt
- 8. Lightweight metal
- 9. Lightest element
- 12. Good conductor of electricity
- 13. Basis of life
- 14. Used in computer chips
- 18. Precious metal, used in jewelry
- 20. Essential for breathing