describing the changes in the atomic model\nbased on the article \will the real atomic model please stand…

Brief Explanations:

One major change is the shift from Dalton's solid - sphere model (where atoms were thought to be indivisible and hard spheres) to Rutherford's nuclear model. Rutherford's gold - foil experiment showed that atoms have a small, dense, positively - charged nucleus at the center, with electrons orbiting around it. This was a significant departure from the previous idea of atoms as uniform spheres. Another example could be the transition from Rutherford's model to Bohr's model, where Bohr proposed that electrons move in specific, quantized energy levels (orbits) around the nucleus, which helped explain atomic spectra. Or the development of the quantum mechanical model, which replaced the idea of definite electron orbits with electron clouds (probability distributions of electron positions), based on quantum theory.

Answer:

A major change was the transition from Dalton's indivisible solid - sphere atomic model to Rutherford's nuclear model, where Rutherford discovered a small, dense, positively - charged nucleus at the atom's center with electrons orbiting around it (or other valid major changes like the shift to Bohr's model with quantized energy levels or the quantum mechanical model with electron clouds).