Atomic Model Timeline

Timeline created by Taylor S
  • 101

    Democritus

    Democritus
  • John Dalton

    John Dalton
    1) All matter is made of atoms. Atoms are indivisible and indestructible. 2) All atoms of a given element are identical in mass and properties 3) Compounds are formed by a combination of two or more different kinds of atoms. 4) A chemical reaction is a rearrangement of ato
  • J.J. Thomson

    J.J. Thomson
    he used a device that had a sealed glass tube which most of the air has been removed.there is a metal disk at each end of the tube. wires connect the metal disks to a source of electric current. when the current is turned on, one disk becomes negatively charged and thr other disk becomes positively charged. a glowing beam appears in the space between the disks.
  • Hantaro Nagaoka

    Hantaro Nagaoka
    he believed that an atom had a central nucles and electrons floating around it. he compared it to the rings of satrun.
  • Ernest Rutherford

    Ernest Rutherford
    he discovered that uraniun has fast moving particles. He condeucting an experement with gold foil to see if particles would move straight threw
  • niels bohr

    niels bohr
    he foced on electrons. he said the arangement of the electons is the center piece of atoms. He said electrons have different engery levels like a stair case.
  • Werner Heisenberg & Erwin Schrodinger

    Werner Heisenberg & Erwin Schrodinger
    The electron cloud is a visual model of the probable locations of electrons in an atom. The probabilty of finding an electron is higher in the denser regions of the cloud.
  • James Chadwick

    James Chadwick
    newtrons- he wanted to show that netrons exestied.