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Dalton thought that atoms were like small balls.
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Thomson said that an atom, is a positively charged sphere with electrons embedded in it. HIs model resembled that of a muffin.
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Hantaro's model showed a positively charged sphere withelectrons circling around the sphere.
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Ernest suggested that the atom was pretty much empty space. Electrons orbit randomly around a positively charged nucleus.
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Bohr said that electrons aren't randomly scattered around the nucleus. His model showed the electrons moving in a specific shells.
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Chadwick discovered the nuetron, it is a particle having about the same mass as the proton, but there isn't any electrical charge.
