Atomic Theory

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Across
  1. 1. did the "oil drop experiment"
  2. 4. inside nucleus, neutral charge
  3. 5. negatively charged particle
  4. 9. average mass of the atom
  5. 10. high-vacuum _______ ray tube
  6. 12. did gold foil experiment
  7. 13. model where electrons are scattered throughout atom
  8. 16. created quantum mechanical model
  9. 18. ________ Ball Model, created by Dalton
Down
  1. 2. _____ model, where electrons orbit a dense nucleus
  2. 3. created the Uncertainty Principle
  3. 6. the _______ is 10,000 times smaller than the atom
  4. 7. inside nucleus, positive charge
  5. 8. discovered the electron
  6. 9. number of protons in the nucleus
  7. 11. formed his atomic theory in 1808
  8. 14. any substance that cannot be decomposed into a simpler substance
  9. 15. rejected the idea that there were 4 elements
  10. 17. neutrons are particles with mass but no ______
  11. 18. said that electrons "jump" between energy levels