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Beleived that if you continually cut a substance in half, eventually you would get an "uncuttable" piece. He called these uncuttable pieces particles, which means indivisible in greek.
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e claimed the reason elements combined was because all elements are made up of atoms. He also published a three- part atomic theory.
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Thomson used a cathode ray tube to inferr that there are small particles inside of every atom.
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This man suggested that electrons travel around the nucleus in definite paths. These paths are always at a certain "level" away from the nucleus.
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he discovered the exsistance of neutrons and that they had no charge at all,this ment that there was no eletical barrar to go through when trying to archive atom disginergration