Atomic Theory and History

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Across
  1. 1. _______ uncertainty principle - can't know speed and location together
  2. 4. Came up with the wave equations that explains electron movement
  3. 6. In 1913 said electrons are in orbits and can jump from one level to another
  4. 10. Experiment done by Thomson
  5. 11. Found that elements combine to form new substances
  6. 12. Greek philosopher who came up with the work atom
  7. 14. The method that Dalton used to figure out water is H and O
  8. 16. Subatomic particle discovered in 1917
  9. 17. Over used word in film that just means "to count" or "number"
  10. 18. __________ model was how Bohr described the atom
  11. 20. The particle of radiation that scientist were using
  12. 22. The nucleus is ______ because of protons
  13. 23. Small dense positive center
  14. 24. Last discovered subatomic particle
  15. 25. Particle discovered in the late 60's that makes up protons and neutrons
Down
  1. 2. First subatomic particle discovered
  2. 3. The experiment that found the nucleus
  3. 5. Most of human history; the 4 elements earth, wind, fire, _____
  4. 7. Dalton realized that elements combine in whole number ratios to form ______
  5. 8. Rutherford said the atom is mostly ______ ______ (2wds)
  6. 9. "Indivisible"
  7. 10. Confirmed the neutron in 1932
  8. 13. electrons are contained in _______ ______ or shells (2wds)
  9. 15. electrons are in a ______ like region not strict paths
  10. 18. ___________ _______ model is how Thompson described the atom (2wds)
  11. 19. Found the Electron in 1897
  12. 21. Found the nucleus in 1911