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He believed in the four elements of air, earth, water and fire.
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He discovered oxygen which he called "dephlogisticated air".
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He created the combustion theory which was based on sound mass measurements.
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Developed the Phlogiston theory.
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He discover that only certain gases canbe combined in certain proprotions.
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Dalton gave oxygen an atomic weight of seven instead of eight.
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In this year, he noted that oxygen and carbon combined together makes two compunds.
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Joseph was the first to announced the law of combining volumes
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He created the Avogadro's Hypothesis in which was not yet approved.
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He was at a conference and wanted the Avogadro's Hypothesis be accepted.
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He creaed the periodic law and developed the first periodic table.
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Discovered cathode rays travel in straight lines.
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He identified the negative charged electron in the cathode ray tube
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They both are chemists-physicists.
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They both discovered two other elements polonium and radium.
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He was the one the created the formula e = 1.60 x 10-19 coulombs
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He created the nuclear atom.
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Found that the energy of the elements coming out from x-rays increased linearly.
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He was the one that said that there was a positive charge on the nucleus.
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Niels Bohr created the Bohr Model of the Atom
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The bohr model is a planetary model.
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He invented the mass spectrograph.
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He discovered the neutron
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He was the person to use the word atom.
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He also was the first one to tell everyone that atomics were mechanically bound.
