Atomic Theory Timeline

By MKBLURP25
  • Period: 442 BCE to

    Atomic Theory Timeline

  • 400 BCE

    Democritus

    Democritus
    • Atoms are "uncuttable"
    • Atoms are small, hard particles -Atoms constantly move
  • 400

    Democritus Atom

    Democritus Atom

  • John Dalton

    John Dalton
    • All substances are made of atoms
    • Atoms of different elements are different.
    • Atoms of the same element are exactly alike -Elements combine in specific proportions
    • He conducted experiments in combining elements

  • John Dalton

    John Dalton

  • J.J. Thomson

    J.J. Thomson
    • He conducted the Cathode-Ray Tube experiment
    • There are small, negatively charge particles in an atom.

  • J.J Thomson Atomic module

    J.J Thomson Atomic module

  • Ernest Rutherford

    Ernest Rutherford
    • Atoms contain empty space
    • He conducted the Gold Foil Experiment Most of Atoms Mass are is in the nucleus
    • There is a small dense positively charged nucleus

  • Ernest Rutherford Atomic Model

    Ernest Rutherford Atomic Model

  • Niels Bohr Atomic Model

    Niels Bohr Atomic Model

  • Niels Bohr

    Niels Bohr
    • Electrons Jump between levels from path to path -Electrons move in empty space in the atom
    • Electrons travel in indefinite paths

  • Schrodinger and Heisenberg

    Schrodinger and Heisenberg
    • Electrons can not be predicted
    • Electrons are found in electron clouds, not paths

  • Schrodinger and Heisenberg

    Schrodinger and Heisenberg