Scientists that contributed to the atomic model

Timeline created by hatke13517
  • 384

    Aristotle

    Aristotle
    Aristotle developed the theroy that all matter consisted of four elements, earth, air, water and fire.
  • 483

    Democritus

    Democritus
    Thought everything in the universe is composed of atoms.
  • John Dalton

    John Dalton
    John Dalton pictures atoms as indestructible particles with no internal structure.
  • Henri Becquerel

    Henri Becquerel
    French physicist who while investigating fluorescence in uranium salts discovered radioactivity that is like x-rays but unlike x-rays could be deflected by a magnetic field so it must consist of charged particles also known as atoms.
  • J.J. Thomson

    J.J. Thomson
    A British scientist discovers the electron leading to his "plum-pudding" model.
  • Hantaro Nagaoka

    Hantaro Nagaoka
    A Japanese physicist suggests that an atom has a central nucleus.
  • Ernest Rutherford

    Ernest Rutherford
    New Zealander states that and atom has a dense positively charged nucleus.
  • Ernest Marsden

    Ernest Marsden
    Helped and worked on Ernest Rutherford's atom model.
  • Neils Bohr

    Neils Bohr
    He applies quantum theory to Rutherford's atomic structure by assuming that electrons travel in stationary orbits defined by their angular momentum.
  • Louis de Broglie

    Louis de Broglie
    He proposed that electrons could behave as waves under some conditions.
  • Max Planck

    Max Planck
    German physicist who formulated an equation describing the blackbody sprectrum and the equation is that energy was directly proportional to frequency. E=hv
  • Erwin Schrodinger

    Erwin Schrodinger
    He determined how to find the probability for where the electron is in an atom.
  • James Chadwick

    James Chadwick
    He first man to discover the neutron-the neutrally charged particle of the nucleus.