Across
- 2. Ernest did what experiment?
- 4. Niels Bohr developed what model?
- 7. What did Werner Heisenberg contribute to?
- 11. What principle did Werner formulate to?
- 12. Who discovered the electron using the cathode ray tube?
- 15. Who was an early Greek philosopher?
- 20. Who formulated the uncertainty principle?
Down
- 1. J.J Thomson discovered the electron using what?
- 3. What did J.J Thomson propose?
- 5. Erwin said " the total number of _____ is one?
- 6. Who proposed Dalton's atomic theory?
- 8. Who did the gold foil experiment?
- 9. Who discovered the neutron?
- 10. Who proposed the quantum mechanical model of the atom?
- 13. What emission did Niels Bohr explain?
- 14. James Chadwick completed the modern picture of the atoms____?
- 16. Erwin Schrödinger introduced electron ____ instead of fixed parts?
- 17. James Chadwick discovered the?
- 18. What should never be of any use to anybody?
- 19. Who developed the Bohr model?