History of an Atom

By scarlettraymond
  • 500 BCE

    Alchemy

    turning base metals into gold.
  • 460 BCE

    Democritus

    Developed the idea of atoms.
  • 450 BCE

    Aristotle

    Didn't believe in the atomic theory, earth, water, and air.- 4 elements.
  • 1492

    Columbus arrives in America

  • Robert Boyle

    Wrote a book opposite of Aristotle's belief (4 elements) replaced with what we believe now.

  • American Revolution

  • Jhon Dalton

    Jhon Dalton
    His theory was that atoms of different elements could be taught by difference in their weights.

  • American civil war

  • Dmitri Menndeleev

    Created the table of the elements, organizing the by their atomic weight and grouping them into families with similar characteristics. "periodic law"

  • J.J Thomson

    His atomis theory identified that electrons inside an atom is visible.

  • Robert Millikan

    Mass of a single electron was at least 1000 times smaller than the smallest atom.

  • Neils Bohr

    created the Bohr model of the atom.

  • world war 1

  • Ernest Rutherford

    Nucleus was surrounded by a large void before the electrons cloud was encountered.

  • James Chadwick

    Discovered the neutron, which is in the nucleus along with protons.

  • world war 2

  • Hans Geiger

    Atomic nucleus "Geiger Counters"

  • Hiroshima