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📌  The Greek model was created by Democritus in 400 B.C.

All matter around us is made of indivisible tiny particles- “atomos”

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📌  The Dalton model was created by John Dalton in 1803.

Atoms of one element are
identical while atoms of different elements are different

Different atoms form compounds in constant ratios.

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📌  The Thomson model was created by J.J Thomson in 1897.

Electrons are dispersed in a uniform positive charge.

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📌  The Rutherford model was created by Ernest Rutherford in 1909.

Positive charge is not like a pudding, but concentrated in the nucleus as shown in the Gold Foil (alpha particle experiment).

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📌  The Bohr model was created by Niels Bohr in 1913.

Electrons orbit the nucleus.

Energy of the electrons is quantized.

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📌  The Quantum Mechanical Model was created by Erwin Schrödinger in 1926.

Electrons can act like particles and waves .

Electrons occupy orbitals.