Periodic Table
Across
- 6. period 7 group 6
- 8. what we need to breathe
- 9. symbol is Au
- 10. Atonic number 92
- 11. The noble gas with the least mass
- 13. has a neutral charge
- 15. all living things have
- 18. most reactive alkaline earth metal
- 19. Most reactive in group 1
Down
- 1. atomic weight of 47.867
- 2. pairs with sodium to make salt
- 3. Noble gas with weight 39.948
- 4. Symbol is U
- 5. Has weight 83.798
- 6. Lots in Yellowstone
- 7. symbol Cu
- 12. used to be used in thermometers
- 14. Period 4 row 4
- 16. Salt
- 17. Atomic number 27