Across
- 3. came to the conclusion that atoms cannot be broken down
- 4. electron location is limited to energy levels
- 7. basic unit of a chemical element
- 8. OG atomic theory guy
- 9. atom with the same number of protons,different number of neutrons
- 10. electrons are spread throughout the atom
- 12. shows that matter is composed of particles called atoms
Down
- 1. tubes used to see electrons
- 2. Cathode - Ray
- 5. found the nucleus of the atom
- 6. consists of neutrons and protons (at center of atom)
- 11. a way to count small particles