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