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A brtish chemiost named John Dalton thought that each element was made of atoms that are the same.
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J.J. Thompson's model suggested that an atom was ball shaped and positively charged with electrons in it.
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A japanese physicist named Hantaro Nagaoka thought of a model that has a ball in the center with a positive charge and electrons revolved around it.
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Ernest Rutherford stated that the atom is mostly an empty space with electrons orbiting randomly around a pisitively charhed nucleus.
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Niels Bohr concluded a model that showed electrons moving in layers that absorb or give off energy when the electrons move through different layers.
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James Chadwick discovered the neutron wich explained why atoms were heavier than the total mass of thier protons and electrons.
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Electrons create a negatively charged cloud around around the nucleus and it is impossible to know exactly where an electron is at any time.
