Periodic Table
Across
- 2. I burn with a brilliant white flame
- 4. my atomic number is 78
- 7. I am a highly flammable gas
- 9. I'm 2 elements combined
- 10. I'm used to make steel
- 12. My atomic number is 27
- 15. I'm brittle steel gray
- 17. I'm everything on the periodic table
- 18. my atomic number is 79
- 19. I can form diamonds
- 20. A rare radioactive gas
Down
- 1. I'm the lightest noble gas
- 3. I form 78% of earths atmosphere
- 5. I'm used for advertising
- 6. A toxic pale green gas
- 8. I protect iron and steel from corrosion
- 11. My name is also a coin
- 13. I'm the air you breath
- 14. Used as an electric light
- 16. Most common noble gas