Across
- 3. tarnishes blue-green, used for a roof or wiring
- 4. used in balloons
- 6. used in computer chips and the name of a valley in California
- 8. bonds with chlorine to make table salt
- 9. very light weight metal used to make tin foil
- 10. metal that caused people to rush to California
- 11. used as an ancient poison
- 13. noble gas that lights up our signs
- 14. trees give off this
Down
- 1. mixes with oxygen to create water
- 2. necessary nutrient and used in fireworks
- 3. good for our bones is found in milk
- 5. its symbol doesn't match its name
- 7. keeps pools clean
- 8. precious metal used to make tableware and jewelry
- 12. found in all living things