Atomic Model Development

Timeline created by tylerholm555
  • 101

    Democritus' atoms

    Democritus believed all matter was made of extremely small particles that could not be divided. He called these particles, atoms.
  • 101

    What Democritus thought atoms looked like

    Democritus thought liquid particles were round and smooth, but atoms in a solid were rough and prickly.
  • John Dalton's atomic theroy

    John Dalton's atomic theroy
    Dalton Proposed the theroy that all matter is made up of individual particles called atoms, which cannot be divided.
  • Thomson's Plum Pudding

    Thomson's Plum Pudding
    J.J. Thomson discovered Plum Pudding in 1897 and put together the "Plum Pudding" model in 1904.He Believied that electrons were surrounded by a soup or cloud of positive charge.
  • Hantaro Nagaoka model

    Hantaro Nagaoka model
  • Ernest Ruthford Experiment

    Ernest Ruthford Experiment
    Ernest Ruthford states that an atom has a dense, positively charged nucleus. Electronsmove randomly in the space around the nucleus.
  • Neils Bohr's model

    Neils Bohr's model
    In Niel's Model, the electrons move in spherical orbits at fixed distances from nucleus.
  • Werner Heisenberg & Erwin Schrodinger model

    Werner Heisenberg & Erwin Schrodinger model
    Erwin Schrodinger develops mathmatical equationk to describe the motion of electrons in atoms. His work leads to the eledtron cloud model.
  • James Chadwick model

    James Chadwick model
    James Chadwick, a british physicist, confirms the existence of neutrons, which have no charges. Atomic nuclei contain neutrons and positively charged particles.