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John Dalton was a chemit who thought all elements are made of atoms that are the same but have different masses. He colcluded that they were shperes with different mass for the different elemennts.
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British chemist Ernest Rutheford concluded that an atom is mostly empty and that protons and newtrons revolve around a center nucleaous which is the main atom.
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Danich physist Niels Bohr prposed that electrons stay on a specific trail rather then randomly.
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A monder day model shows that atoms are bunched to gether and the protons and newtrons are connected to them by a magnetic force.
