Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. What experimental evidence led to the development of this atomic model from the one before it? A. A few of the positive particles aimed at a gold foil seemed to bounce back. B. The colors of light emitted from heated atoms had very specific energies. C. Experiments with water vapor showed that elements combine in specific proportions. D. Cathode rays were bent in the same way whenever a magnet was brought near them.

A) True. This result led to the discovery that the positive charge and the mass of the atom are in a very small region, called the nucleus

Explanation:

Atomic models developed as knowledge about atoms increased.

The first model was from Thomson where the positive charge was distributed in the volume of the atom and the negative charge was able to move freely

The second atomic model was originated by the Rutherford experiment, where a positive charge (alpha particles) and some of them bounced, establishing that the mass and the positive charge was concentrated in a very small space

With this we can analyze the proposed results.

A) True. This result led to the discovery that the positive charge and the mass of the atom are in a very small region, called the nucleus

B) False. This did not lead to any atomic model

C) False. This is for molecule and is not used in atomic models.

D) True. This led to the Thomson model, where electrons move freely and positive charges are fixed.

C. Equations were used to identify regions around the nucleus where electrons would likely be.