Across
- 3. 2nd element on periodic table
- 4. father of modern atomic theory
- 7. each column in periodic table
- 8. atomic # 20
- 9. symbol is Ag
- 13. group 2 on the periodic table.
- 16. gases group 18
- 18. 1st element on periodic table
- 19. atomic # 79
- 20. small particles; make up most of matter
Down
- 1. group 17
- 2. each row in periodic table
- 5. so soft, can be cut with knife.
- 6. best science teacher ever
- 10. can use the inner shell before using the outer shell
- 11. discovered neutron
- 12. charged atom
- 14. brittle right side of periodic table
- 15. semiconductors
- 17. most of the elements