Across
- 5. Element important for bones and shells
- 9. Noble gas that glows brightly in electric signs
- 10. Very reactive element; forms fluoride
- 11. — Ionic compound made from Na⁺ and Cl⁻
- 13. Universal solvent made of hydrogen and oxygen
- 14. A very light noble gas used in balloons
- 15. Light metal used in rechargeable batteries
- 16. Good electrical conductor used in wiring
- 17. Makes up most of Earth’s atmosphere
- 18. Metal used to coat steel to prevent rust
Down
- 1. Soft, valuable metal with symbol Au
- 2. Strong disinfecting element used in pools
- 3. Compound of nitrogen and hydrogen used in cleaners
- 4. Metal that rusts when exposed to oxygen and water
- 6. Nonmetal that burns with a blue flame
- 7. Main component of natural gas and a greenhouse gas
- 8. Highly reactive metal found in many salts
- 11. Element used in computer chips and found in sand
- 12. Essential gas for most forms of combustion
- 16. DIOXIDE Gas produced when carbon burns or when we exhale