Across
- 3. What month was helium discovered in?
- 6. What is number 2 on the periodic table?
- 7. Who created the periodic table?
- 9. Who discovered gold?
- 10. what element is Fe?
- 12. What is number 1 on the periodic table?
Down
- 1. What element has the atomic mass of 24.305?
- 2. who discovered Chlorine?
- 4. who discovered Radon?
- 5. What is number 103 on the periodic table?
- 8. What is number 109 on the periodic table?
- 11. What element has a melting point of 1455 degrees Celsius