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History of the Periodic Table

  • Johann Dobereiner

    Johann Dobereiner
    Johann Dobereiner was born in 1780 on the thriteenth of december. He was a german chemist who in 1828 discovered the similarities between certain elements. He considered a periodic system of elements to be developed soon.
  • Lothar Meyer

    Lothar Meyer
    Lothar Meyer was born in 1830 on the 19th of august. He was a german chemist and he discovered how to group the elements by their valence. He was working on the early version of the periodic table which had 28 elements at that time and discovered that they were grouped into 6 families according to their valence.
  • Dmitri Mendeleev

    Dmitri Mendeleev
    Dmitri Mendeleev was born on the 8th of febuary in 1834. In 1863, 63 elements were than discovered and Mendeleev attempted to arrange them in a periodic table. He noticed that if you order the elements by their chemical properties, he observed patterns that led him to creating his own piece of the periodic table.
  • John Newlands

    John Newlands
    John Newlands was born in 1837 on the 26th of november. He was a british chemist who discovered a pattern bettween the elements claiming that if the elements were put in order of the atomic weights you could see a pattern. The pattern from his observation repeated after every seventh element.
  • William Ramsay

    William Ramsay
    William Ramsay was a scottish chemist who discovered noble gases. He realised that after discovering numerous other elements, that they were a whole different group to the elements already on the periodic table. He was awarded the Nobel Prize for his discovery.
  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford was born in 1871 on the 3rd of august. He was the first to design high frequency of alternating currents and experiment with it.
  • Henry Moseley

    Henry Moseley
    Henry Moseley was born in 1887 on November the 23rd. He discovered the atomic number of each element and changed the periodic law. He measured the elements atomic mass using x-ray.
  • Glenn Seaborg

    Glenn Seaborg
    Glenn Seaborg was born in 1912, April 19th. Glenn discovered the transuranium elements and he demonstrated how they fit into the periodic table. His discovery and information made it possible to predict future elements that could be found and their radioactive characteristics.