Across
- 2. Basic building block of matter
- 4. Positive charge
- 7. Classified matter as 4 elements
- 8. First modern chemist
- 10. introduced idea of electromagnetic radiation has dual wave particle nature
- 13. Negative charge
- 14. Law of multiple proportions
- 16. Law of Definite Proportions
- 18. determined mass of electron
- 19. added onto Rutherford's ideas
Down
- 1. concluded there are 2 types of atoms
- 3. named individual positively charged proton
- 4. proposed relationship between a quantum of energy and the frequency of radiation.
- 5. gold foil experiment
- 6. Discovered oxygen
- 9. Discovered the electron
- 11. No charge
- 12. discovered radioactivity
- 15. Law of conservation of mass
- 17. suggested that the structure of atoms are related to electricity