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The Solid Sphere model is an atomic model proposed by John Dalton in 1803. It states that all objects are made of particles called atoms and that they are solid spheres that cannot be divided further into smaller particles.
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In 1904, J.J. Thompson created the Plum Pudding Model. In the model of the atom, the electrons were embedded in a uniform sphere of positive charge.
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Ernest Rutherford created The Nuclear Model in 1911. The model described the atom as a tiny, dense, positively charged core called a nucleus.
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Niels Bohr made The Bohr (Planetary) Model in 1913. In the Bohr model, the electrons travel in defined circular orbits around the small positively-charged nucleus. The Bohr Model is known as a planetary model because these orbits look similar to that of planets orbiting the sun.
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In 1926, Erwin Schrödinger created the Quantum Mechanics Model. Schrödinger combined the equations for the behavior of waves with the de Broglie equation to generate a mathematical model for the distribution of electrons in an atom.
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