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Solid Sphere Model
The solid sphere model was the first Atomic Model. It was created by Dalton in the early 19th Century. -
The Plum Pudding Model
An experiment with cathode ray tubes showed that all Atoms contain tiny negative charged electrons. -
The Nuclear Model
This model showed the atom has tiny, dense, positively charged core called the Nucleus. Which is where all the mass is stored. -
The Bohr (Planetary) Model
It is a system consisting of a small, dense nucleus surrounded be orbiting electrons. -
Quantum Mechanical Model
This model treats the electrons as matter waves. They have a Intrinsic property called Spin.