Across
- 1. electrons located on the outermost energy level
- 3. discovered atom was a solid indivisible mass
- 6. lowest energy level
- 7. 7 valence electrons
- 8. levels electrons located around the nucleus
- 11. group 1 period 4
- 12. atomic symbol Cu
- 13. used math to describe location and energy of an atom
- 15. s=1, p=3, d=5, f=7
- 16. atoms that gained energy in higher energy shells
- 18. SI unit of frequency
- 19. [Ne] 3s^1
- 20. amount of energy required to move one electron to another energy level
Down
- 2. 1s^2 2s^2 2p^3
- 4. described atoms as having a nucleus surrounded by an electron cloud
- 5. atomic number 2
- 9. 35 protons and electrons
- 10. v=C/λ
- 11. separates colors of light
- 14. columns of the periodic table
- 17. quantum of light energy