* The atom has a dense, positively charged nucleus at its center. This was contrary to the prevailing "plum pudding model" which suggested the positive charge was evenly distributed throughout the atom. Rutherford observed that most alpha particles passed straight through the gold foil, but some were deflected at large angles, and a few even bounced back. This suggested that the positive charge was concentrated in a small, dense region, which he named the nucleus.
* Most of the atom is empty space. Since most alpha particles passed through the foil without being deflected, Rutherford concluded that the atom was mostly empty space, with electrons orbiting the nucleus.
This discovery revolutionized our understanding of the atom and led to the development of the planetary model of the atom, which depicted electrons orbiting the nucleus like planets orbiting the sun.
While Rutherford's model was a significant improvement over previous models, it was later refined by Niels Bohr, who introduced the concept of quantized energy levels for electrons.
