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He made his discovery in 400 BC. He made his theory on observations and natural curiosity. His atom looked like a plain cirle.
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He made his discovery in 1803. He developed the 1st useful atomic theory of matter. He performed a series of experiments on mixtures of gasses to determine what effect properties of the individual gases had on the properties of the mix as a whole. The atom looked like a billiard ball.
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He discovered the electrons. He did this by expirementing on cathode rays. It was called The Plum Pudding Model.
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Made dicovery in 1911. He discoved the nucleus in an atom. The method he made to dicover this is by completeting the gold foil experiment.
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He discovered that the electrons moved differently. He changed the orbit of the electons. The method he used was the Quantum theory. Proposed a theory for the hydrogen atom based on the Quantum theory.
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He discovered the energy levels of an atom. It changed the atom by adding energy levels. The method he used is by combining equations for the behavior of waves.
