Across
- 2. number at the top
- 6. Found in nucleus
- 9. brittle, poor conductors
- 11. chemical reaction
- 13. Outer most electrons
- 16. energy is apsorbed
- 19. Where elections are found
- 22. chemist who developed the periodic table
- 24. any element in group 18
- 25. letters in the middle
Down
- 1. isolated system is neither created or destroyed
- 3. good conductors
- 4. going down the side of P.T.
- 5. Smallest part of the element
- 7. Substance of an atom
- 8. Atom carrying positive charge
- 10. when metal and non metals combined
- 12. reaction of layering of metal
- 14. economic
- 15. going across the to of the P.T.
- 17. energy is released
- 18. numbers at the bottom
- 20. Carrying negative charge
- 21. one or more atom of any element combined
- 23. atom of same or different go to different element