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The atomic theory was then changed to described the atom more corectly. Dalton's theory has changed alot.
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In 1897 JJ Thomson showed that there was a mistake the the Dalton's Theroy. Thomson discoverd that there are small particles inside the atom.
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Rutherford started with the Thomson idea that atoms are soft "blobs" of matter, He expected the particles to pass right through gold in a dtraight line.
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Democritus belived that you would never end up with a particle that could not be cut up.
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An element such as radium produced the particles. Than the lead stop all of the positive particles except for a small stream aimed at a gold-foiled target.
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He stuied the way that atoms reach to the light .
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They explained the nature of electrons in the atom.
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Aristotle made the four elements.water, fire, earth, air
