John Duda Timeline

  • Antoine Lavoisier

    ( )A French nobleman who named the elements carbon, hydrogen and oxygen and discovered oxygen’s role in combustion and respiration; established that water is a compound of hydrogen and oxygen; discovered that sulfur is an element and helped continue the transformation of chemistry from a qualitative science into a quantitative one.
  • Joseph Louis Proist

    ( He first published his Law of Definite Proportions (or Law of Constant Composition) in 1794. This law states that a compound is composed of exact proportions of elements by mass regardless of how the compound was created. For example, to make water there is a specific ratio of grams of hydrogen to grams of oxygen regardless of where your sample of water was found. All water has this particular proportion.
  • John Dalton

    ( )He identified the hereditary nature of red-green color blindness. In 1803 he revealed the concept of Dalton’s Law of Partial Pressures. Dalton's fascination with gases gradually led him to formally assert that every form of matter (whether solid, liquid or gas) was also made up of small individual particles.
  • Michael Faraday

    Faraday found electromagnetismAn English scientist who contributed to the fields of electromagnetism and electrochemistry. As a scientist his main discoveries include electromagnetic induction, diamagnetism and electrolysis.
  • Henri Bequerel

    ( He researched the newly discovered X-rays it led to studies of how uranium salts are influenced by light. By accident, he discovered that the uranium salts spontaneously emitted a penetrating radiation that could be registered on a photographic plate. Further studies made it clear that this radiation was something new - not the same type as X-rays. He had discovered a new phenomenon - radioactivity.
  • J.J . Thomson

    J.J, Thomson presented a hypotheses that cathode rays are charged particles in 1897. Thomson proposed a model, sometimes called the "plum pudding" or "raisin cake" model, in which thousands of tiny, negatively charged corpuscles swarm inside a sort of cloud of massless positive charge. This theory was struck down by Thomson's own former student, Ernest Rutherford. Using a different kind of particle.Cathode rays are charged particle
  • Max Planct

    ( Planck made many contributions to theoretical physics, but his fame rests primarily on his role as originator of the quantum theory. This theory revolutionized our understanding of atomic and subatomic processes. he made the famous discovery that in 1918 won him the Nobel Prize for Physics and that brought him many other honors.
  • marie curie

    ( She opened up the science of radioactivity. She is best known as the discoverer of the radioactive elements polonium and radium and as the first person to win two Nobel prizes. For scientists and the public, her radium was a key to a basic change in our understanding of matter and energy. Her work not only influenced the development of fundamental science but also ushered in a new era in medical research and treatment.
  • Robert Milikan

    ( Robert Millikan measured the charge on an electron with the apparatus shown below. In these experiments, the atomizer from a perfume bottle was used to spray water or oil droplets into a sample chamber. Some of these droplets fell through a pinhole between two plates of an electric field, where they could be observed through a microscope.
  • Ernest Rutherford won several honorary degrees and fellowships from organizations such as the Institution of Electrical Engineers. In 1914 he was knighted. In 1931, he was elevated to the peerage, and granted the title Baron Rutherford of Nelson. He was also elected president of the Institute of Physics that same yearA pioneer of nuclear physics and the first to split the atom, Rutherford was awarded the 1908 Nobel Prize in Chemistry for his theory of atomic structure.
  • Lisa Meitner

    ( Lise Meitner was an Austrian physicist who worked on radioactivity and nuclear physics. Meitner was part of the Hahn-Meitner-Strassmann team that worked on "transuranium-elements" from 1935 onward. She remains one of the most important figures in the fields of radioactivity and nuclear physics. The name of the chemical element, meitnerium (Mt), was suggested in Meitner’s honor, who is also widely credited as the discoverer of protactinium.
  • Otto Hahm

    ( Otto Hahn discovered nuclear fission.After studying chemistry at the University of Marbug, Hahn moved to London to study radioactivity with Sir William Ramsay. It became a lifelong interest. In 1938, Hahn and radiochemist Fritz Strassmann discovered nuclear fission. They were awarded the Nobel Prize in Chemistry in 1944.
  • Albert Einstein

    ( Albert Einstein was a German-born physicist who developed the general theory of relativity, among other feats. He had a passion for inquiry that eventually led him to develop the special and general theories of relativity. In 1921, he won the Nobel Prize for physics for his explanation of the photoelectric effect and immigrated to the U.S. in the following decade after being targeted by the Nazis.
  • Neils Bohr

    The discoveries of the electron and radioactivity at the end of the 19th century led to different models for the structure of the atom. In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted. Bohr's theory could explain why atoms emitted light.
  • Ernest Schrodinger

    ( Ernest Rutherford is the father of nuclear chemistry and nuclear physics. He discovered and named the atomic nucleus, the proton, the alpha particle, and the beta particle. He discovered the concept of nuclear half-lives and achieved the first deliberate transformation of one element into another, fulfilling one of the ancient passions of the alchemists.
  • james chadwick

    ( James Chadwick discovered the neutron in 1932 and was awarded the Nobel Prize for Physics in 1935. He led the British team in the Manhattan Project, in which the UK and Canada supported the USA’s World War 2 effort to build the world’s first nuclear bomb.
  • Louis De Broglie

    ( de Broglie (In full:Louis-Victor-Pierre-Raymond, 7e duc de Broglie) was an eminent French physicist. He gained worldwide acclaim for his groundbreaking work on quantum theory. In his 1924 thesis, he discovered the wave nature of electrons and suggested that all matter have wave properties. He won the 1929 Nobel Prize for Physics.
  • Glen Seaborg

    ( won a Nobel Prize before he was 40. Nine presidents sought his advice. He discovered the element that makes atomic bombs explode. And he discovered radioisotopes used to treat millions of cancer patients.