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Across
  1. 3. Number of waves per second
  2. 5. Path of moving electron
  3. 6. Uncertainty principle scientist
  4. 8. Distance between wave crests
  5. 9. Light released by excited atom
  6. 11. Energy level around nucleus
  7. 12. Higher energy electron state
  8. 14. Proposed atomic theory
  9. 16. Rate of wave travel
  10. 18. Lowest energy state
  11. 20. Scientist behind quantum theory
  12. 21. Range of light frequencies emitted
  13. 23. Discrete energy packet
  14. 24. Discovered the electron
Down
  1. 1. Proposed model of atom structure
  2. 2. Height of a wave
  3. 4. Explained photoelectric effect
  4. 7. Discovered atomic nucleus
  5. 10. Representation of atomic structure
  6. 13. Particle of light energy
  7. 15. Created periodic table
  8. 17. Arrangement of electrons
  9. 19. Developed wave equation
  10. 21. Division of electron energy levels
  11. 22. Researched radioactivity