Across
- 4. uncuttable
- 5. different for every element
- 7. center of the atom containing the protons and neutrons
- 8. creator of best guess in history
- 10. the space outside the nucleus where the electrons are
- 15. idea of a greek philosopher
- 17. neutral charged particles
- 18. conducted the cathode ray tube experiment
Down
- 1. positive charged particles
- 2. made the basic model; easy to understand
- 3. negative charged particles
- 6. creators of the modern theory
- 9. found the nucleus of the atom
- 11. disagreed with best guess in history
- 12. model named after a popular pudding
- 13. electrons move in theses like light
- 14. made the model that is a solid circle (billiard ball)
- 16. basic building block