Across
- 1. Which element was once commonly used in thermometers?
- 3. Which element has 5 protons?
- 8. Which element has an average atomic mass of 24.31?
- 9. Which element is commonly used in electrical wiring?
- 10. Which element is used in glowing signs?
- 12. Which element is used to fill balloons so they float?
- 13. Which element is important for strong bones?
- 17. Which element do humans need to breathe?
- 18. Which element has the symbol Fe?
- 19. Which element has an average atomic mass of 39.10?
Down
- 2. Which element is commonly found in pencils?
- 3. Which element has 4 protons?
- 4. Which element is the lightest metal?
- 5. Which element has the symbol Ag and is used in jewelry?
- 6. Which gas makes up most of Earth’s atmosphere?
- 7. Which element is added to toothpaste for healthy teeth?
- 11. Which element is widely used in computer chips?
- 14. Which element has the symbol Ar?
- 15. Which element has 17 protons?
- 16. Which element has the symbol Na?