Story of the Atom

  • 500 BCE

    Alchemists

    Alchemists
    Location: Mesopotamia, Ancient Egypt, Persia, India, Japan, Korea and China, in Classical Greece and Rome, in the Muslim civilizations, and then in Europe up to the 19th century

    When: 500 BC
    Known for: Laid down the foundation of the modern day Periodic Table of Elements.
  • 360 BCE

    Aristotle

    Aristotle
    Location: Athens When: 360 BC- 340 BC
    Known for: He did not believe the Atomic Theory he believed that all substances were made of Fire, Water, Air and Earth.
    Fact: Only approximately one-third of Aristotle's books and writings have been saved.
  • 360 BCE

    Democritus

    Democritus
    Location: Greece When: 360 BC
    Known for: Believed that everything was composed of atoms.
    Fact: He was one of the worlds first, and greatest, Greek Philosophers.
  • Antoine Lavoisier

    Antoine Lavoisier
    Location: France When: Late to mid 1700s
    Known for: Found the two elements that make up water (Oxygen and Hydrogen)
    Fact: Has an award named after him called the Lavoisier Medal.
  • John Dalton

    John Dalton
    Location: England When: Early 1800s
    Known for: proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.
    Fact: Won the Royal Medal
  • W.K. Roentgen

    W.K. Roentgen
    Location: France When: 1870s
    Known for: He discovered X-rays, which react with Fluorescence.
    Fact: Born March 27th, 1845 in Germany
  • William Crookes

    William Crookes
    Location: London When: 1870s
    Known for: Discovered the element thallium and invented the radiometer, the spinthariscope, and the Crookes tube.
    Fact: Won the royal medal (1875)
  • J.J Thompson

    J.J Thompson
    Location: Cambridge When: 1880s
    Known for: He discovered the electron by experimenting with a crookes, or Cathode ray, tube.
    Fact: In 1918 he became Master of Trinity College and held the post until his death.
  • Charles Augustin De Coulomb

    Charles Augustin De Coulomb
    Location: France When: Late 1770s to Early 1800s
    Known for: Coulombs Law- It states that the force between two electrical charges is proportional to the product of the charges and inversely proportional to the square of the distance between them.
    Fact: He was the son of Henril Coulomb, an inspector of the Royal fields in Montpellier.
  • Eugen Goldstein

    Eugen Goldstein
    Location: Germany When:1880s
    Known for: Goldstein concluded that in addition to the electrons, or cathode rays, that travel from the negatively charged cathode toward the positively charged anode, there is another ray that travels in the opposite direction, from the anode toward the cathode.
    Fact: Won the Hughes Medal
  • The Curies

    The Curies
    Location: Paris When: 1890s
    Known for: Discovered Radium and Polonium.
    Fact: Marie met Pierre Curie because she was looking for a larger laboratory space.
  • Henri Becquerel

    Henri Becquerel
    Location:France When: 1890s
    Known for: Discover radioactivity
    Fact: Nobel Prize in physics
  • Ernest Ruther-Ford

    Ernest Ruther-Ford
    Location: Cambridge When: 1897
    Known for: He discovered alpha and beta rays, set forth the laws of radioactive decay, and identified alpha particles as heliem nuclei. Most important, he postulated the nuclear structure of the atom.
    Fact: The element 'rutherfordium' was named in Rutherfords honor.
  • Robert Millikan

    Robert Millikan
    Location: Pasadena, California When:Early to mid 1900s
    Known for: Found the accurate determination of the charge carried by an electron
    Fact:He was chairman of the executive counsil at Caltech.
  • Albert Einstein

    Albert Einstein
    Location: Bern, Switzerland When: Early 1900s
    Know for: In 1905, Albert Einstein published an analysis in which he devised a mathematical way to predict the size of both atoms and molecules.
    Fact: Won the Nobel Prize in Physics (1921) and the Barnard Medal (1920)
  • Max Planck

    Max Planck
    Location: Germany When: 1900s
    Known for: The Quantum Theory
    Fact: Won the Nobel Prize in Physics. (1918)
  • Rutherford's Nuclear Atom

    Rutherford's Nuclear Atom
    Proposed by: Ernest Rutherford
    First Proposed: 1911
  • Solar System Model

    Solar System Model
    Proposed by: Neils Bohr
    First Proposed: 1913
  • Bohr's Model

    Bohr's Model
    Proposed by: Neils Bohr
    First Proposed: 1913
  • Geiger

    Geiger
    Location: In the cities of Erlangen and Nuremberg When: Early 1900
    Known for: Atomic Nucleus
    Fact: Won the Hughes Medal (1929) and the Duddell Medal and Prize.(1937)
  • Neils Bohr

    Neils Bohr
    Location: Copenhagen When: 1920s-1930s
    Known for: Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus, but can jump from one energy level to another.
    Fact: Bohr had been awarded his own Nobel Prize for physics in 1922
  • Erwin Schrodinger

    Erwin Schrodinger
    Location: Austria and Dublin, Ireland When; 1920s
    Known for: Quantum-Mechanical Theory(1926)
    Known for: Won the Matteucci Medal, nobel prize in Physics and, Max Planck Medal
  • James Chadwick

    James Chadwick
    Location: Manchester When: 1920s-1930s
    Known for: The discovery of the neutron.
    Fact: During WW1, he was interned in the Zivilgefangenenlager, Ruhleben.
  • Electron Cloud Model

    Electron Cloud Model
    Proposed by: Erwin Schrodinger and Werner Heinenberg
    First Proposed: 1925
  • Lise Meiter

    Lise Meiter
    Location: Berlin, Germany When: Late 1930s to early 1940s
    Known for: Led the small group of scientists who first discovered nuclear fission of uranium when it absorbed an extra neutron.
    Fact: She was the first women to become a full professor of physics in Germany.
  • Glenn T. Seaborg

    Glenn T. Seaborg
    Location: California When: 1940s
    Known for: Discovered and investigated ten transuranium elements
  • Otto Hahn

    Otto Hahn
    Location: Germany When: Mid 1900s
    Known for: Discovered Nuclear fission during an experiment in which the uranium atom split into barium.
    Fact: Won the Nobel Prize in chemistry (1944)
  • Murray Cell-Mann + George Zweig

    Murray Cell-Mann + George Zweig
    Location: Michigan When: Mid 1960s
    Known for: Found that all Hadrons are made from smaller particles called quarks.
    Facts:Gell-Mann speaks 13 languages fluently.