The Greatness of the Atom

  • 100


    Was the first person to propose the idea that matter was not infinitely divisble. He believed matter was made up of tiny individual particles called atomos. YEAR: 460-370 BC
  • 150


    One of the most influnetial greek phiolsophers rejected theory, because it didn't agree with his own ideas on nature. He did not belieed that the nothingess of empty space could exist. 384-322 BC
  • Sep 24, 632

    Muhammad dies

    Muhammad dies
    leader of muslim faith dies.
  • Declaration of Independence

    Declaration of Independence
    Was written by the patriots on this day.
  • Antonie Lavosier

    Antonie Lavosier
    is recognized as the father of medrn chemistry. His experiments led to the law of the conservation of mass. He also defined the process of respiration.
  • Joesph Proust

    Joesph Proust
    Introduced the law of definite proportions.
  • John Dalton

    John Dalton
    All matter is composed of extremely small particles called atoms. all atoms of a given element are identical, having the same size, mass, and chemical properties. Modern atom theory
  • Amaveo Avagardo

    Amaveo Avagardo
    relationship between the masses of the same volume of different gases (at the same temperature and pressure) corresponds to the relationship between their respective molecular weights.
  • Assassination of Abraham Lincoln

    Assassination of Abraham Lincoln
  • William Crooks

    William Crooks
    Invented cathode ray. Crooks was able to create the 4th state of matter which is Plasma.
  • JJ Thomson

    JJ Thomson
    Experimented and found that atoms were broken down into subatomic particles. This is when the electron was found.
  • Henri Becquerel

    Henri Becquerel
    Said that the penetrating radiation came from the uranium itself, without any need of excitation by an external energy source
  • Max Planck

    Max Planck
    matter can gain or lose energy only in small, specific amounts called quanta.
  • Madame Curie

    Madame Curie
    Famous for her work with radioactivity. Discovered radium, and Polonium.
  • Robert Millikan

    Robert Millikan
    Discoved the charge of the electron, and developed a formula to find the mass of the electron.
  • The boy scouts are founded

  • Ernest Rutherford

    Ernest Rutherford
    Developed a more modern and supported atom model, and figured out there is a nucleus in the middle of the atom.
  • The mona lisa is stolen

    The mona lisa is stolen
  • Niels Bohr

    Niels Bohr
    Proposed a quantum model for the hydrogen atom has only certain allowable energy states. Lowest is ground state, highest is excited state.
  • Henry Moseley

    Henry Moseley
    Discovered that atoms of each element contain a unque postiive charge in their nuclei, and that the number of protons decided what element it was.
  • Albert Einstein

    Albert Einstein
    facts about einsteinDeveloped the modern Theory of Realitivity. famous equation E=MC^2.
  • Louis deBroglie

    Louis deBroglie
    proposed an idea that accounted for the fixed energy levels of Bohr's model. He said that electrons acted like waves.
  • Werner Heisenberg

    Werner Heisenberg
    concluded that it is impossible to make any measurement on an object without disturbing the object- at least a little.
  • Erwin Schrodinger

    furthered the wave-particle theory proposed by de Broglie. Derived an equation that treated the hydrogen aton's electron as a wave.
  • James Chadwick

    James Chadwick
    Discovered that there was another sub atomic particle called the neutron. And that it's mass was the same as the proton.
  • Attack on Pearl Harbor

    Attack on Pearl Harbor
  • Color TV introduced

    Color TV introduced
  • Dr. Seuss writes the Cat in the Hat

    Dr. Seuss writes the Cat in the Hat
  • Elvis the King was found dead

    Elvis the King was found dead
  • Fall of the Berlin Wall

    Fall of the Berlin Wall
  • Hubble Telescope Launched

    Hubble Telescope Launched
  • Scientists Clone Sheep

    Scientists Clone Sheep