scientists have changed the model of the atom as they have gathered new evidence. one of the atomic models…

scientists have changed the model of the atom as they have gathered new evidence. one of the atomic models is shown below.\nwhat experimental evidence led scientists to change from the previous model to this one?\na few of the positive particles aimed at a gold foil seemed to bounce back.\nthe colors of light emitted from heated atoms had very specific energies.\nexperiments with water vapor showed that elements combine in specific proportions.\ncathode rays were bent in the same way whenever a magnet was brought near them.

scientists have changed the model of the atom as they have gathered new evidence. one of the atomic models is shown below.\nwhat experimental evidence led scientists to change from the previous model to this one?\na few of the positive particles aimed at a gold foil seemed to bounce back.\nthe colors of light emitted from heated atoms had very specific energies.\nexperiments with water vapor showed that elements combine in specific proportions.\ncathode rays were bent in the same way whenever a magnet was brought near them.

Answer

Brief Explanations:

The atomic model shown with a central nucleus and electrons in circular orbits corresponds to Rutherford's nuclear model, which replaced Thomson's plum pudding model. The key evidence for this change was the α-particle scattering experiment, where a few positive particles (α-particles) bounced back from gold foil, indicating a dense, positively charged nucleus. This matches option A. Other options relate to different experiments: B (Bohr's model, spectral lines), C (Dalton's atomic theory, law of definite proportions), D (cathode rays, electron discovery by Thomson).

Answer:

A. A few of the positive particles aimed at a gold foil seemed to bounce back.