Jacqueline's Digital Timeline

By Jacqueline.Perez15

  • 1809 at least 47 elements were discovered

  • 1680 Robert Boyle discovered phosphorus and it became famous.

    1680 Robert Boyle discovered phosphorus and it became famous.

  • 1863 John Newlands divided the 56 discovered elements into 11 groups

    1863 John Newlands divided the 56 discovered elements into 11 groups

  • 1869 Dmitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass

    1869 Dmitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass

  • 1894 William Ramsay and Lord Rayleigh discovered noble gases, which were added to the periodic table as group 0

    1894 William Ramsay and Lord Rayleigh discovered noble gases, which were added to the periodic table as group 0

  • 1897 J.J. Thomson discovered electrons

    1897 J.J. Thomson discovered electrons

  • 1900 Henri Becquerel discovered electrons and beta particles are the same thing

    1900 Henri Becquerel discovered electrons and beta particles are the same thing

  • 1945 Glenn Seaborg identified that elements with >92 atomic number are usually placed below the periodic table

    1945 Glenn Seaborg identified that elements with >92 atomic number are usually placed below the periodic table