First Periodic Table

English chemist and physicist John Dalton constructed the periodic table in 1803. Upon determining the atomic weights of elements numbers then displaying them in tabular form, with symbolic representation. The elaborate periodic table was created in 1869 by Russian chemist Dmitry Ivanovich Mendeleyev indicating chemical relationships of elements based on their atomic number and weight.

      1803, 1869
      John Dalton
      Chemist, Physicist

Additional Information:

    li>Periodic table history – Lenntech
    Inventor: Dmitri Mendeleev. In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them. In 1886 French physicist Antoine Bequerel first discovered radioactivity.
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