Dalton: , Atom was indivisible and not made of other smaller parts. , Atoms of a given element are identical. , Solid Sphere Model, Thomson: , Found that the atom was not just a small dense circle, Discovered the electron. , limitation was there was no separate nucleus or cloud, Rutherford: He experimented using Gold Foil and found cloud, Discovered the positively charged nucleus, , Limitation was there were no energy levels in the cloud, Bohr: , Electrons have a fixed amount of energy in an orbit. , Electron in an orbit close to the nucleus are on their lower energy state. , Planetary Model, Schrödinger: Electrons move in waves, It is impossible to know the exact location of the electrons, , Quantum Model,

Atomic Models

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