Chemistry Crossword

12345678910111213141516171819
Across
  1. 1. Which element was once commonly used in thermometers?
  2. 3. Which element has 5 protons?
  3. 8. Which element has an average atomic mass of 24.31?
  4. 9. Which element is commonly used in electrical wiring?
  5. 10. Which element is used in glowing signs?
  6. 12. Which element is used to fill balloons so they float?
  7. 13. Which element is important for strong bones?
  8. 17. Which element do humans need to breathe?
  9. 18. Which element has the symbol Fe?
  10. 19. Which element has an average atomic mass of 39.10?
Down
  1. 2. Which element is commonly found in pencils?
  2. 3. Which element has 4 protons?
  3. 4. Which element is the lightest metal?
  4. 5. Which element has the symbol Ag and is used in jewelry?
  5. 6. Which gas makes up most of Earth’s atmosphere?
  6. 7. Which element is added to toothpaste for healthy teeth?
  7. 11. Which element is widely used in computer chips?
  8. 14. Which element has the symbol Ar?
  9. 15. Which element has 17 protons?
  10. 16. Which element has the symbol Na?