History of the Atom

By 19eatonr
  • 101

    Democritus

    Democritus
    In 460 BC, Democritus concluded that everything is made up of atoms.

  • Dalton

    Dalton
    Dalton discovered the Atomic Theory;
    1. All matter is made of atoms that can be combined
    2. Atoms of the same elements are exactly alike
    3. Atoms of different

  • Thomson

    Thomson
    Discovered that atoms were not simple solid spheres. He discovered electrons, small particles located outside the nucleus and have a negative charge.

  • Einstein

    Einstein
    He came up with E=mc2.

  • Rutherford

    Rutherford
    He came up with the name of the center the nucleus. He had concluded that the positively charged particles are in the nucleus and the negatively charged particles are around the nucleus.

  • Bohr

    Bohr
    Borh proposed that electrons orbit around the nucleus.

  • Heisenberg

    Heisenberg
    He discovered the behavior of electrons. Said that you can’t know both the exact position and momentum of an electron

  • Chadwick

    Chadwick
    Came up with the idea that not only positively charge particles were in the nucleus.