Jalen Dobson's Atomic Theory Timeline

By dobsonjv
  • 440 BCE

    "Atoms constantly move." - Democritus

    Democritus
  • 440 BCE

    Atoms are “uncuttable." - Democritus

    Democritus
  • 440 BCE

    "Atoms are small, hard particles." - Democritus

    Democritus

  • "All substances are made of atoms." - Democritus

    Democritus

  • "Atoms of the same element are exactly alike." - John Dalton

    John Dalton

  • "Atoms of different elements are different." - John Dalton

    John Dalton

  • "He conducted the cathode-ray tube experiment." - JJ Thomson

    J.J. Thomson

  • "His theory of the atomic structure lead to the “plum-pudding” model." - Rutherford & Thomson

    Rutherford and Thomson

  • "He conducted the gold foil experiment." - Hans Geiger & Ernest Marsden

    Hans Geiger and Ernest Marsden

  • "Atoms contain mostly empty space." - Ernest Rutherford

    Ernest Rutherford

  • "Electrons move in empty space in the atom." - Ernest Rutherford

    Rutherford

  • "Most of an atom’s mass is in the nucleus." - Rutherford

    Rutherford

  • "Electron paths cannot be predicted." - Bohr

    Bohr

  • "Electrons jump between levels from path to path." - Bohr

    Bohr

  • "Electrons travel in definite paths." - Bohr

    Bohr

  • "Elements combine in specific proportions." - Louis de Brogile

    Louis de Brogile

  • "Electrons are found in electron clouds, not paths." - Erwin Schrödinger and Werner Heisenberg

    Erwin Schrödinger and Werner Heisenberg