Hantaro Nagaoka was born in 1865 and died in 1950. Hantaro Nagaoka was famous for making the Saturnian model and stating that J. J.Thomson's model of an atom was incorrect and that the electron was actually located on the outside of the atom. The following paragraphs show and tell about hantaro Nagaoka’s life. How he became famous and how a small summary of his life.
Hantaro Nagaoka was born in Omura,Nagasaki Prefecture Japan in 1865. He was a physicist and a pioneer of Japanese physics in the Meiji Period. The electron was actually located on the outside of the atom. Hantaro was educated at the Department of Physics at the Tokyo University. After graduating in 1887 he worked with a visiting British physicist ,Cargill Gilston Knott, on magnetism. In 1893 he traveled to Europe, where he continued his work at the universities in Berlin, Munich, and Vienna. He also attended, in 1900, the First in Paris, where he heard Marie Curies Lecture on radioactivity which aroused his interest in atom physics at Tokyo university till 1925. After his retirement he was appointed as a scientist in REKON, and also served as the first president of Osaka University.
Physicist in the 1900 first started to consider the structure of atoms. The recent discovery of J. J. Thomson of the negatively charged electron implied that a neutral atom must also contain an opposite positive charge. In 1903 Thomson had suggested that the atom was a sphere of uniform positive electrification , with electrons scattered across it like plum in an pudding. (Later known as the Plum Pudding Model)
Nagaoka rejected Thomson's model on the ground that opposite charges are impenetrable. He proposed an alternative model in which a positively charged center...
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Glogster https://www.google.com/search?q=hantaro+nagaoka&espv=210&es_sm=93&source=lnms&tbm=isch&sa=X&ei=24QPU9EykvGgBIz-goAI&ved=0CAkQ_AUoAQ&biw=1365&bih=889&dpr=0.75#facrc=_&imgdii=_&imgrc=mIBtEFdYoSQC7M%253A%3B2mnC92VQ5KSYaM%3Bhttp%253A%252F%252Frikanet2.jst.go.jp%252Fcontents%252Fcp0270b%252Fcontents%252Fimages%252Flarge%252F034.jpg%3Bhttp%253A%252F%252Fwww.glogster.com%252Fbadhluuchia%252Fhantaro-nagaoka%252Fg-6l8m7aiu953bmhemm5o71a0%3B350%3B467 , 2 | 21| 14 http://en.wikipedia.org/wiki/Hantaro_Nagaoka . N.p.. Web. 27 Feb 2014. . http://www.encyclopedia.com/doc/1G2-2830903102.html Nagaoka, Hantaro." Complete Dictionary of Scientific Biography. 2008.Encyclopedia.com. 27 Feb. 2014 .
J.J. Thompson didn’t really believe that the atom was the smallest piece to matter. So he did some experiments with running current through a glass tube with the air sucked out of it. That’s what a cathode ray tube is. It has a negative charge attached to the cathode (the metal piece farthest to the side of the tube) and the positive charge attached to the anode (the metal piece closer to the center of the tube). After running current through the cathode he realized that a stream of light was projected from the end that was being charged to the opposite and showing at the inside of the tube. He wasn’t very sure what it meant at first but then he figured it out.
After graduating from MIT, he went straight into work at Bell Laboratory. He did most of his research in solid state physics, especially vacuum tubes. Most of his theoretical advances led the company to conquer their goal of using electronic switches for telephone exchanges instead of the mechanical switches there were using at the time. Some of the other research he did was on energy bands in solids, order and disorder in alloys, self-diffusion of copper, experiments on photoelectrons in silver chloride, experiment and theory on ferromagnetic domains, and different topics in transistor physics. He also did operations research on individual productivity and the statistics of salary in research laboratories.
Hantaro Nagaoka was born on August 15, 1865, in the Nagasaki Prefecture, in Japan. He went to school at Tokyo University, Hantaro was a famous Japanese physicist who contributed importantly to the atomic model.
Teller, who is a “Hungarian-born atomic physicist” and “known as the "father" of the hydrogen bomb”, was at the forefront when it came to the design of the Teller-Ulam Hydrogen Bomb (Hydrogen Bomb Exploded). Stanislaw Marcin Ulam, mathematician who developed the idea of the lithium hydride bomb, was the other half of that perfect combination. Although there was excitement for the U.S. being the first to be the bomb, some scientists did not share that excitement. Not all people agreed with the idea of building this bomb, some people had their doubts. For example, Julius Robert Oppenheimer was a highly known theoretical physicist and Director of the Los Alamos Laboratories.
Although the atomic theory was developed in increments, George Johnston Stoney is most famous for contributing the term electron: fundamental unit quantity of electricity. Stoney would develop the concept fourteen years before he coined the term electron. He also made contributions to the theory of gasses, cosmic physics, and estimated the number of molecules in a cubic millimeter of gas.
As a scientist, Millikan made numerous momentous discoveries, chiefly in the fields of electricity, optics, and molecular physics. His earliest major success was the accurate determination of the charge carried by an electron, using the elegant "falling-drop method"; he also proved that this quantity was a constant for all electrons (1910), thus demonstrating the atomic structure of electricity. Next, he verified experimentally Einstein's all-important photoelectric equation, and made the first direct photoelectric determination of Planck's constant h (1912-1915). In addition his studies of the Brownian movements in gases put an end to all opposition to the atomic and kinetic theories of matter.
Attraction and repulsion between electric charges at the atomic scale explain the structure, properties, and transformations of matter, as well as the contact forces between material objects. (HS-PS2-6)
Born on August 30th, 1871 in New Zealand, Ernest Rutherford accomplished to be one of many successful chemists throughout the world in the 19th and the 20th centuries. With his brilliant experiments he explained the puzzling problem of radioactivity and the sudden breakdown of atoms. In addition, he determined the structure of the atom and was first to ever split it. Rutherford's great mind triggered innovations of new technology such as the smoke detector that saves many lives today.
Dmitri Mendeleev was one of the most famous modern-day scientists of all time who contributed greatly to the world’s fields of science, technology, and politics. He helped modernize the world and set it farther ahead into the future. Mendeleev also made studying chemistry easier, by creating a table with the elements and the atomic weights of them put in order by their properties.
Richard P. Feynman was born in 1918 in Brooklyn; in 1942 he received his Ph.D. from Princeton. Already displaying his brilliance, Feynman played an important role in the development of the atomic bomb through his work in the Manhattan Project. In 1945 he became a physics teacher at Cornell University, and in 1950 he became a professor at the California Institute of Technology. He, along with Sin-Itero and Julian Schwinger, received the Nobel Prize in Physics in 1965 for his work in the field of quantum electrodynamics.
Before Rutherford’s Geiger-Marsden experiment the most popular model of the atom was the “plum pudding model” developed in 1904 by the person who also discovered the electron in 1897, J.J. Thompson. It was the most common model of the atom and stated that electrons (plum) floated around with free movement in a mass of positive charge (pudding), hence the name “plum pudding.” There were no other sub-atomic particles in the diagram, as they had not been discovered at the time of J.J. Thompson’s model of the atom, however it was know that the atom has neutral, so Thompson’s theory of the positive cloud substituted protons. There were several problems with Thompson’s model, including the lack of a nucleus with protons, which lead Thompson and other scientists to believe that the atom had electrons to balance out it’s positively charged nature and give the atom a neutral charge. Although this theory was widely accepted, some scientists theorised that Thompson’s model was incorrect, one of them being Hantaro Nagaoka who countered Thompson’s model with the argument that opposite charges cannot infiltrate one another, so the positive charge held by the atom must be focused in the nucleus and the electrons would revolve around the outside. Rutherford’s experiment would prove Nagaoka correct, ...
1 David Halliday, Robert Resnick, and Jearl Walker, Fundamentals of Physics, Extended, 5th ed. (NewYork:Wiley, 1997) 361
The next big step in the discovery of the atom was the scientific test that proved the existence of the atom. After the discovery of the atom we had the discovery of subatomic particles. With the discovery of the subatomic particles came the research, which came from experiments that were made to find out more about the subatomic particles. This research is how we uncovered that most of the weight of an atom is from its nucleus. With the gold foil experiment, tested by Ernest Rutherford, he discovered the existence of the positively charged nucleus. He proved this when the experiment was happening, a small fraction of the photons th...
Scientists from earlier times helped influence the discoveries that lead to the development of atomic energy. In the late 1800’s, Dalton created the Atomic Theory which explains atoms, elements and compounds (Henderson 1). This was important to the study of and understanding of atoms to future scientists. The Atomic Theory was a list of scientific laws regarding atoms and their potential abilities. Roentagen, used Dalton’s findings and discovered x-rays which could pass through solid objects (Henderson 1). Although he did not discover radiation from the x-rays, he did help lay the foundations for electromagnetic waves. Shortly after Roentagen’s findings, J.J. Thompson discovered the electron which was responsible for defining the atom’s characteristics (Henderson 2). The electron helped scientists uncover why an atom responds to reactions the way it does and how it received its “personality”. Dalton’s, Roentagen’s and Thompson’s findings helped guide other scientists to discovering the uses of atomic energy and reactions. Such applications were discovered in the early 1900’s by using Einstein’s equation, which stated that if a chain reaction occurred, cheap, reliable energy could b...
From this simple observation, Rutherford concluded that the atom's mass must be concentrated in a small positively-charged nucleus while the electrons inhabit the farthest reaches of the atom. Although this planetary model of the atom has been greatly refined over the years, it remains as valid today as when it was originally formulated by Rutherford. In 1919, Rutherford returned to Cambridge to become director of the Cavendish laboratory where he had previously done his graduate work under J.