Across
- 1. arranged atoms on periodic table
- 3. wave mechanical model
- 4. elements consist of atoms
- 8. electrons are in circular paths
- 9. nucleus center and tiny electrons moved in space around it
Down
- 1. oil drop experiment
- 2. matter is composed of empty space
- 5. electrons move in waves
- 6. plum pudding model
- 7. discovered neutrons