atomic timeline

By bilalA
  • plato
    427 BCE

    plato

    Solids are made of triangle shaped elements. Believed triangle are the correct shape for atoms. Also was born in Athens.
  • Democritus
    400 BCE

    Democritus

    believed atoms where undefined and incompressible. And thought atoms moved in infinite numbers. Also made the formula of the atomic theory
  • solar system model
    330 BCE

    solar system model

    Illustrates the relative positions and motions of the planets. Made by Nicholas Copernic's.
  • The Alchemists
    1500

    The Alchemists

    Created the atomic alchemist theory. And attempted making gold from lead. Also found experimental tools and techniques.
  • Robert Boyle

    Robert Boyle

    Added the theory of mechanics. Alleging that all substances could be described as motion. And is the pioneer of atomic method.
  • Antoine Lavoisier

    Antoine Lavoisier

    Defined law of conversavtions of mass. Found out that combustion and respiration are caused by chemical reactions.
  • John Dalton

    John Dalton

    Suggested that atoms are indestructible and invisible. And introduced the atomic theory in chemistry.
  • Billiard ball model

    Billiard ball model

    Model of a atom refers to similar structure of a atom made by john Dalton.
  • Amedeo Avogadro

    Amedeo Avogadro

    Found that equal volumes of gasses at the same temp had same particles. Also published a french journal on physics. He also corrected Dalton's formula for water.
  • Dimitri Mendeleev

    Dimitri Mendeleev

    He built the periotic table. He was a chemist also he was Russian.
  • Electron cloud model

    Electron cloud model

    Is a function that can calculate and use wave like behavior's to find electrons. Made by Warner Heiserngrey.
  • Pierre and Marie and curie

    Pierre and Marie and curie

    Proved radioactive particles cause atoms to break down.
  • JJ Thompson

    JJ Thompson

    Found all atoms contain electrons the first subatomic particle to be found. Used plum pudding as a model.
  • Plum pudding model

    Plum pudding model

    Depicts electrons as negatively charged. Embedded in positive charge.
  • albert einestein

    albert einestein

    Proved the existence of atoms. Also made mass Equivalence energy formula.
  • Ernest Rutherford

    Ernest Rutherford

    Proved atoms have a nucleus where mass is concentrated. Also was born in new Zealand.
  • Robert Millikan

    Robert Millikan

    Discovered change of electron. Also found the measurement of a electricals charge in a atom.
  • Henry G.J.Mosley

    Henry G.J.Mosley

    showed major props are determined by atomic numbers. He was also a English's physicist.
  • James Chadwick

    James Chadwick

    Discovered the neutron Another subatomic particle. And also received a noble prize.
  • Nelis Bohr

    Nelis Bohr

    Proposed theory for the hydrogen atom. Based on quantum theory. Made foundational contributions to understanding the atomic theory