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I am Democritus. I suggested the theory of invisible atoms with their own individual size shape and motion and atom are indivisible.
and atoms of different ones are different and combined are made by combining atoms
I, John Dalton, suggested that atoms of one element are all the same,
I am J.J. Thomson. I discovered the (+)particle and (-) electron of atoms
Particle on the outside, electron inside
I am Ernest Rutherford and I suggested that atoms have particle in the center, called proton,
and called the center of an atom nucleus
I ,Niels Bohr, modified Mr. Rutherford's Atomic model suggesting that the electrons move around the nucleus
I worked with Rutherford as well. I am James Chadwick
I discovered particles with no charge and called them neutrons
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