Across
- 5. negative
- 7. shells
- 8. Probabilistic
- 10. aufbau
- 11. energetic
- 12. preceding
- 13. lewis
- 16. building
- 17. particle of light
- 19. positive
- 20. energy level
Down
- 1. electron
- 2. fingerprint
- 3. quantized
- 4. subshell
- 6. quantum
- 9. outermost
- 14. wave particle
- 15. lowest energy
- 18. physics