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He did not believe in atoms. He thought everything was made from 4 elements: Earth wind water and fire.
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Developed the theory that everything is made up of atoms.
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Made his own atomic theory that is also known as "Dalton's 5 postulates"
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He discovered the element thallium. Mades crookes tube that is used in studies of cathode rays.
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The "law of octaves" says if the chemical elements are arranged according to atomic weight, the ones that have similar properties happen after each interval of seven elements.
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Made the Periodic Table. It was arranged according to atomic weight and similar properties.
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known as the father of physics. He discovered the neutron
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Discovered the Electron. He also made the Plum Pudding Model
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Determined that electrons travel orbits around the nucleus. Created a new atomic model
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discovered the neutron is in the nucleus in 1932
