The Atomic Theory

  • 350


    aristotle beleived that the world was made up of 4 elements: earth, air, water, and fire.
  • 440


    democritus was the first philosopher to come up with the theory that everything is made up of tinier items that are invisable and indestrucable
  • Period: Feb 26, 1564 to

    Galilei Galileo

    when the idea was almost lost, Galileo did an experiments of falling objects brought it back to life
  • Robert Boyle

    Robert Boyle
    robert boyle proved that the 4 element theory, when he proved that an element are substances that can't be divided into smaller parts.
  • John Dalton

    John Dalton
    came up with the first person to come up with the first atomic theory
  • Amedeo Avogadro

     Amedeo Avogadro
    he showed told the differences between a atom and a molecule.
  • Period: to

    James Clerk Maxwell

    he came up with the idea that atoms were the world's building blocks.
  • Period: to

    Lord Ernest Rutherford

    discovered protons within the nucleus of the atoms
  • Period: to

    Dimitri Mendeleev

    he orginized the elements into the periodic system
  • J.J Thomson

    J.J Thomson
    he discovered electrons
  • Sir James Chadwick

    Sir James Chadwick
    discovered neutrons within the nucleus