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