Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is ...

This defied the existing atomic model, which assumed atoms were uniformly spread out. From this, Rutherford proposed a revolutionary new model of the atom. He suggested that the atom consists of a ...

Changes to the atomic model Atoms have a central positive nucleus. Most of the mass of an atom is found in the nucleus. New evidence In-depth work on Rutherford's model showed it had limitations.

In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons ... However, there was still a difference between the atomic number of the atom and the atomic mass.

In 1803, John Dalton's atomic theory brought them into scientific ... That opened the door to subatomic hypotheses and ...

Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is ...