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442 BC founded that atoms make up different shapes and sizes

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Werner Heisenberg born worked on atomic theory he formulated quantum mechanics in terms of metrics and in discovering the uncertainty principle with profound implications, when he worked and research on the atomic theory was February 1927.

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In 1897 J.J discovered that all atoms contained tiny negatively charged subatomic particles or electrons. To find this information he experimented. He created these experiments with cathode ray tubes or withe crooks.

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Neils/Bohr-van Leeuwen

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The year of research/discovery is 1967 November 18

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The year of research/discovery is 1967 November 18

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The year of research/discovery was in 1869 when Dmitri Mendeleev found that, when all the known chemical elements were arranged in order of increasing atomic weight, the resulting table displayed a recurring pattern, or periodicity, of properties within groups of elements. Dmitri Mendeleev is represented by his creation like his own version of the periodic table of elements.

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Known for the discovery of the neutron in 1932

He found the discovery by having an bombarded of alpha particles an used an energetic stream of radiation

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Year researched/discovery in 1803
He discovered atomism. He developed methoods in order to calculate atomic weights and structures.