Across
- 2. Highly valued yellow metal
- 5. Strong but lightweight metal
- 6. Most reactive halogen
- 8. Essential for DNA often found in fertilizers
- 10. Lightweight metal used in cans and foil
- 11. Noble gas that glows in signs
- 12. Greenish gas used for disinfection
- 16. Commonly known as salt's component
- 17. Common metal essential for blood
- 19. Most abundant gas in Earth's atmosphere
- 20. Noble gas used in balloons
Down
- 1. Precious metal valued for jewelry
- 3. Basic building block of life
- 4. Yellow nonmetal key in amino acids
- 7. Metal vital for photosynthesis
- 9. Semiconductor widely used in electronics
- 13. Lightest element essential for water
- 14. Metal known for electrical conductivity
- 15. Alkali metal used in batteries
- 18. Essential for respiration