Across
- 3. increases as you go down the periodic table with the exception of 7A
- 4. group8A
- 5. first group in the periodic table
- 8. group 2A in periodic table
- 10. model of the atom that includes the orbitals and all electrons
- 12. group 4A
- 14. group 7A
- 15. group 6A
Down
- 1. rings around the nucleus
- 2. the groups in the middle of periodic table
- 6. vertical lines in the periodic table
- 7. the horizontal lines in the periodic table
- 9. the model that includes only the valence electrons
- 11. group 5A
- 13. group 3A