Atomic Model timeline

By Michaela J.
  • 430 BCE

    Democritus

    Democritus
    Democritus composed all bodies are made of many atoms. Also saying everything generally dose.
  • 339 BCE

    Solar System Model

    Solar System Model
    This model was referred to as Orrey. With a bunch of small atoms.
  • 1300

    The Alchemists

    The Alchemists
    The Alchemists laid the groundwork for chemical processes. Also attempted to find the Stone of Knowledge (Philosopher’s Stone).

  • Robert Boyle

    Robert Boyle
    Robert Boyle demonstrated that particles of matter. He said these particles were in the atom & very small.

  • Antone Lavoisier

    Antone Lavoisier
    Antone Lavoisier defined the law of conversions of mass. Saying it is 1 kg to 9.8 N.

  • Billiard Ball Model

    Billiard Ball Model
    This model was referred to as a ball like structure. Also easy to relate to as 8-Balls.

  • John Dalton

    John Dalton
    Suggested that all the matter was compromised of individual atoms. Also that they has masses and properties.

  • Plato

    Plato
    Plato theorized that soils have small invisible elements shaped like a triangle. Proven to be true

  • Amedeo Avogadro

    Amedeo Avogadro
    Amedeo Avogadro gas contains weight and doesn’t settle.

  • Dmitri Mendeleev

    Dmitri Mendeleev
    Dmitri Mendeleev classified elements on the periodic table.

  • JJ Thompson

    JJ Thompson
    JJ Thompson provided a model of the atom. The model of the atom was continued to be used in science.

  • Pierre & Marie Curie

    Pierre & Marie Curie
    Pierre & Marie discovered the element polonium & Radium. Both elements on the periodic table now.

  • Plum Pudding Model

    Plum Pudding Model
    The electrons were in a uniformed sphere. Also they had a positive charge.

  • Albert Einstein

    Albert Einstein
    Albert Einstein, described each atom. He said it was an independent quantum harmonic oscillator with the same enfrenqueney.

  • Robert Millikan

    Robert Millikan
    Robert Millikan said that electrons carried a charge. This charge was small at it flowed through electrons, in which electrons are small.

  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford established that the mass of the atom coordinates to the nucleus.

  • Neils Bohr

    Neils Bohr
    Neil’s Bohr proposed the theory of the Hydrogen atom. Proven to be a correct theory.

  • Henry G.J. Mosley

    Henry G.J. Mosley
    Henry G.J. Mosley published the atomic number formula. This formula was used after.

  • James Chadwich

    James Chadwich
    James Chadwich proved that the elements particle had electrical charge.

  • Electron Cloud model

    Electron Cloud model
    A standard model of small particles. Still study today to see any patterns or changes.