The evolution of the periodic table

  • Robert Boyle discovered phosphorus

    Robert Boyle discovered phosphorus
  • Henry Cavendish discovered hydrogen as a colorless odorless gas

    Henry Cavendish discovered hydrogen as a colorless odorless gas
  • In 1789, Antoine Lavoisier grouped the elements based on their properties into gases, non-metals, metals and earths.

    In 1789, Antoine Lavoisier grouped the elements based on their properties into gases, non-metals, metals and earths.
  • In 1829, Johann Döbereiner recognized triads of elements with similar properties he showed that the properties of the middle element could be predicted from the properties of the other two.

    In 1829, Johann Döbereiner recognized triads of elements with similar properties he showed that the  properties of the middle element could be predicted from the properties of the other two.
  • John Newland arranged the elements in order of atomic weights and observed similarities between some elements

    John Newland arranged the elements in order of atomic weights and observed similarities between some elements
  • Dmitri Mendeleev made a periodic table that was arranged by the atomic mass and arranged periodically with elements similar with similar properties under each other

    Dmitri Mendeleev made a periodic table that was arranged by the atomic mass and arranged periodically with elements similar with similar properties under each other
  • William Ramsay discovered the noble gases

    William Ramsay discovered the noble gases
  • J.J Thompson discovered neutrons

    J.J Thompson discovered neutrons