1st Atomic Model (3): Dalton , Atoms were solid spheres , , 3rd Atomic Model (6): Rutherford , Gold Leaf Experiment , , Nuclear Model, The mass is concentrated at the center of the nucleus and the nucleus has a charge , Replaced the plum pudding model, 4th Atomic Model (4): Bohr , Planetary Model , , Electrons orbit the nucleus at set distances, 2nd Atomic Model (4): Thompson , Plum Pudding Model , , The atom is a ball of positive charge with negative electrons embedded in it, 5th Atomic Model: Chadwick, Discovered the presence of neutrons in the nucleus, About 20 years after the nucleus was an accepted scientific idea,

History of the Atom

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