7 sept. 2022 - Timeline Question answers
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1. J.J Thomson2. alpha particles were observed to scatter backward from a gold foil.
3. Dalton
4. Rutherford and Chadwick
5. Bohr
6. the basic unit of a chemical element.
7. Dalton
8. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.
9. Bohr
10. In the Bohr Model, the electron is treated as a particle in fixed orbits around the nucleus. In the Quantum Mechanical Model, the electron is treated mathematically as a wave. The electron has properties of both particles and waves.
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7 sept. 2022
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