Development of the Periodic Table

  • Antoine Lavoisier

    Antoine Lavoisier
    He wrote the first extensive list of elements containing 33 elements & distinguished between metals and non-metals
  • Jakob Berzelius

    Jakob Berzelius
    He developed a table of atomic weights & introduced letters to symbolize elements
  • Alexandre-Emile Béguyer de Chancourtois

    Alexandre-Emile Béguyer de Chancourtois
    A French geologist that listed the elements on paper tape and wound them,around a cylinder. Certain ‘threes’ of elements with similar properties came together down the cylinder. He called his model the ‘telluric screw’.
  • John Newlands

    John Newlands
    He noticed that, if the elements were arranged in order of atomic weight, there was a periodic similarity with every 8 elements. He proposed his ‘law of octaves’ on this.
  • Lothar Meyer

    Lothar Meyer
    complied a periodic table with 56 elements. wich were based on the regular repeating pattern of physical properties such as molar volume. the elements were arranged in order of increasing atomic weights.
  • Dmitri Mendeleev

    Dmitri Mendeleev
    He produced a periodic table based on atomic weights but arranged ‘periodically’. Elements with similar properties appeared under each other.Gaps were left for yet to be discovered elements.
  • Henry Moseley

    Henry Moseley
    He determined the atomic number of each of the known elements. He realised that, if the elements were arranged in order of increasing atomic number rather than atomic weight, they gave a better fit within the ‘periodic table’.
  • Glenn Seaborg

    Glenn Seaborg
    He artificially produced heavy mass elements such as neptunium. These new elements were part of a new block of the periodic table called ‘actinides.