Rutherford Atomic Model
Ernest Rutherford decided to put Thomson's Model to the test and set up an experiment using golf foil and a cathode ray and it showed some of the rays reflected back. The results showed there was a strong center piece to the atom. He revised Thomson's model and came up with a atom that has a strong center nucleus that is positively charged. He used rays that bounced of the nucleus amd that showed a strong central center.
The electron cloud
Erwin shroud her and Louis de brogile discovered the electron cloud in 1926. This Model said that many different electrons with different charges floated freely around a nucleus made up of protons and neutrons. Using a series of different math equations he determined the probability of an atom being in a certain place.