Across
- 1. periodic table
- 4. type of elements
- 6. look at the elements
- 9. in the 50's
- 10. row of elements
- 11. a way to see a chemical reaction
- 13. is the number below the letters
- 16. in every living thing
- 18. in the 90's
- 19. everything has them
Down
- 2. side to side row
- 3. near the 56
- 5. give positive charge
- 7. give off negative charges
- 8. change lanes while moving
- 12. lower box
- 14. symbol Si
- 15. a way to tell a physical change happened
- 17. up and down row
- 20. when you roll something