The Atomic Theory By The Years by; Bradley Allen, Airey, and Jordan Dodge

Timeline created by bradster2121
  • 384

    Aristole

    Aristole
    He belived in the four elements; water, windm earth, and fire. He also believed that matter could be cut in half infinite times
  • 400

    democrtius

    democrtius
    He proposed the existance of an ultimate particle tha the called an " atomos."
  • Antoine Lavoisier

    Antoine Lavoisier
    discovered the law of Definte Proportions or the law of Constant Composition. Which means that when something is made it will be made the same the way anytime u make that substance
  • Joseph Proust

    Joseph Proust
    Discovered the law of Definite Proportions. This states that every substance is made up of the same combinations of elemnts
  • John Dalton

    John Dalton
    Discovered the Law of Multiple Proportions. this law stated that the masses of one element that combined with a fixed mass of another element in different compounds are in simple, whole number ratios
  • JJ Thompson

    JJ Thompson
    Identified the electron and classified them as being negativly charged. also proposed the plum Pudding model of tha atom
  • Robet MIllikan

    Robet MIllikan
    He determined the unit charge of the electron
  • Ernest Rutherford

    Ernest Rutherford
    Published the atomic theroy that tht atomn has a positvley charged center neucles surrounded by negative electrons
  • Niels Bohr

    Niels Bohr
    Discovered how to calculate the electrons energy levels
  • Louis De Brogile

    Louis De Brogile
    Proposed that electrons could act as waves in certain situations
  • Erwin Shrodinger

    Erwin Shrodinger
    He developed the Shrodinger Equation, This can be used to predit how atoms and molocules react
  • Warren Heisenburg

    Warren Heisenburg
    He discovered the Heisenburg Uncertanity Principle, This stated that a moving particle cannot be measued with high percison
  • James Chadwick

    James Chadwick
    He confirmed the existrance of the nuetron