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History of Atomic Theory by M. Osterhout

By mosterhout

  • John Dalton

    John Dalton
    John Dalton proposed that elements consisted of atoms that were identical and had the same mass and that compounds were atoms from different elements combined together.

  • J.J. Thompson

    J.J. Thompson
    J.J. Thomson determined the charge to mass ratio of electrons.

  • Rutherford

    Rutherford
    Rutherford discovered alpha, beta, and gamma rays in radiation

  • Bohr

    Bohr
    Niels Bohr proposed an atomic structure theory that stated the outer orbit of an atom could hold more electrons than the inner orbit.

  • Werner Heisenberg

    Werner Heisenberg
    Werner Heisenberg elucidated the Uncertainty Principle

  • Schrodinger

    Schrodinger
    Erwin Schrodinger developed the equation which is used today to understand atoms and molecules - the Schrodinger Equation

  • James Chadwick

    James Chadwick
    James Chadwick discovered neutrons, particles whose mass was close to that of a proton.