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Bohr atomic model essays
Niels bohr atomic theory
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Niels Bohr Born in Copenhagen, Denmark, on October 7, 1885 to mother Ellen Adler, and father, Christian Bohr, Niels would later go on to be a Nobel Prize winner in the category of physics. He attended the University of Copenhagen, where he studied physics. In 1911 he received his doctorate and left to England to study under J.J. Thomson, the man who discovered the electron. In 1912 he married Margrethe Norlund. Together they had 6 sons, one of which followed in his father’s footsteps and won his own Nobel Prize in physics in 1975 Bohr’s main focus was working on a way to understand the structure of an atom. He took inspiration from what he learned from Ernest Rutherford, and Max Planck’s ideas, and proposed that the atom consisted of a nucleus, and the electrons around this nucleus existed at set energy levels or orbitals. This deviated from Rutherford’s idea that the electrons existed in a cloud around the nucleus and could be at any place in that cloud. Bohr’s model is set up so that is an atom were to absorb energy, the electrons in it would be pushed into higher orbitals of the electron cloud. If the atom lost energy, the electrons would be attracted closer to the nucleus sitting in lower orbitals. Bohr’s model of the atom was a significant step forward in the understanding of atomic structure. He received the Nobel Prize for his model in 1922. In, 1916 Bohr took up professorship at Copenhagen University. Here he taught theoretical physics, although the physics department was small at the time, Bohr was able to convince the faculty to approve the establishment of an institute for theoretical physics. In the inaugural speech of the institute, Bohr stressed the importance of continuing to test previously held ideas in theoreti... ... middle of paper ... ...ompletely understand them and because I have chosen to do this assignment so late in the semester, I do not have adequate time to familiarize myself with the topic enough to write about it confidently so I’m giving you two essays in hopes that you will accept them. I realize that this is entirely my fault, and the only reason I am turning this in is because I feel like if I don’t turn anything in, then I didn’t even try, and I did try (twice), this is the proof whether you choose to believe it or not. If you don’t plan on giving me a grade for what I’m turning in, or if you even read this without my meeting the 2000 word mark, I do not want to discuss my not turning in the completed assignment because I understand that I will lose the 10% on my grade. Whether you choose to grade it or not is all I would like to know if you do feel like telling me something about it.
In "Energy Story" uses an explanation of atoms and tells us the parts of an atom and its structure. In the text it
Harold Bloom. New York: Chelsea House Publishers, 1991. Clark, Larry. A. A. "*******your essay ideas*******." E-Mail message. 10 March 1996.
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.
Oppenheimer's early studies were devoted mainly to energy processes of subatomic particles, including electrons,positrons, and cosmic rays. He also did innovative work on not only neutron stars but also black holes. His university provided him with an excellent opportunity to research the quantum theory, along with exploration and development of its full significance. This helped him train an entire generation of U.S. physicists. Furthermore, the most important impact was the invention of the atomic bomb.
His data he from his experiments led to the discovery of the physical electron in an atom by J.J. Thomson at Cambridge around 1898, and was H.A. Lorentz’s baseline for his formal theory on the existence of the electron. In his Nobel Lecture in 1902 Lorentz would go on to acknowledge and credit Stoney for his contributions to his study. His discoveries changed the way others looked at the atomic structure. He received an honorary Doctorate of Science (D.Sc.) from the University of Dublin in June 1902 just 9 years before he died at the age of eighty-five. The lasting impact of his work is acknowledged even today because he aided in the advancement of the atomic theory by providing a new piece to the incomplete atomic
Niels Bohr's model of the hydrogen atom, was the primary reason for the understanding of energy levels.Bohr was able to explain the bright line spectrum of hydrogen. Sparked by the recent discovery of the diffraction patterns, scientists believed electrons could be described as waves. Bohr hypothesized that energy is being added to the hydrogen gas in the electricity form, and then leaving the gas in the form of light. He figured the light rays to be quantized, meaning only certain frequencies of the light rays can be seen. In turn, he reasoned that the hydrogen atoms themselves were quantized and, that they only can exist in certain energy levels. When the atoms absorb specific amounts of energy, they exist for a small period of time in higher energy levels. But as soon as these atoms lose their energy, they move back down to the lower levels of energy. His theory went on to state how the hydrogen atom can move up and down the energy levels, one level at a time, and can never stop in between. Every hydrogen atom is made up of a single electron - proton system. Because the negative electron is attracted to the positive proton, potential energy is created inside the atom.He figured that the farther away the electron is from the proton, the greater the potential energy is inside. In conclusion, since hydrogen atoms emit light energy in specific frequencies, the hydrogen atom must be within a specific energy level and nothing else. The different wavelengths help to determine the different colors emitted from the atom. The greater the wavelength, the faster the atom can be filled and jump to a higher level.Bohr developed his theory after studying the work of Einstein's ideas on the photons of energy.
In 1907, Einstein used Planck’s hypothesis of quantization to explain why the temperature of a solid changed by different amounts if you put the same amount of heat into the material. Since the early 1800’s, the science of spectroscopy had shown that different elements emit and absorb specific colors of light called “spectral lines.” In 1888, Johannes Rydberg derived an equation that described the spectral lines emitted by hydrogen, though nobody could explain why the equation worked. This changed in 1913 when Danish physicist Niel Bohr applied Planck’s hypothesis of quantization to Ernest Rutherford’s 1911 “planetary” model of the atom, which affirmed that electrons orbited the nucleus the same way that planets orbit the sun. Bohr offered an explanation for why electrical attraction does not make the electrons spiral into the nucleus. He said that electrons in atoms can change their energy only by absorbing or emitting quanta. When an electron absorbs a quantum it moves quickly to orbit farther from nucleus. When an electron emits a quantum the electron jumps to a closer
Heinrichs, Jay. Thank You for Arguing. 1st ed. revised. Three Rivers Press: New York, New
Long story short, let me be honest and say that the longer essay stapled to the back of this one is the one I wrote first, because I read the instructions wrong. I thought I would attach that paper also and turn it in, since I took the time to write it, and finished it before realizing it was not what you were looking for. It does, however, relate to this paper, because in this paper I will (indirectly) give the reasons why I wanted to write that paper in the first place.
in the world including Niels Bohr and Max Born. Like many of the top physicists
From a very young age, I have enjoyed reading a wide spectrum of topics. However, during high school, I had become preoccupied with physics during my studies and readings, and so I began to focus my attention upon the materials that further shed light on the science. The more I read, the more I became intrigued with the interrelations between matter, energy, and time and space motion illustrated through the science. Therefore, motivated to become one of Saudi Arabia’ few female physicists, upon graduating from high school I opted to major in the science that captivated me like no other....
Stemming from the first years of the 20th century, quantum mechanics has had a monumental influence on modern science. First explored by Max Planck in the 1900s, Einstein modified and applied much of the research in this field. This begs the question, “how did Einstein contribute to the development and research of quantum mechanics?” Before studying how Einstein’s research contributed to the development of quantum mechanics, it is important to examine the origins of the science itself. Einstein took much of Planck’s experimental “quantum theory” research and applied it in usable ways to existing science. He also greatly contributed to the establishment of the base for quantum mechanics research today. Along with establishing base research in the field, Einstein’s discoveries have been modified and updated to apply to our more advanced understanding of this science today. Einstein greatly contributed to the foundation of quantum mechanics through his research, and his theories and discoveries remain relevant to science even today.
To start off, learning the Bohr-Rutherford diagrams in grade nine was a very big confusion for me. I had never fully understood how many shells should go around the nucleus nor did I know how to do the many calculations. As I progressed into grade ten, the teachings became easier. The review shows an example such as in the the bohr diagram, a nucleus is in the center, which is a little circle, and following that there are shells surrounding it containing electrons. Each ring can only hold a certain amount of electrons, and so the first shell around the nucleus can hold a maximum of 2 electrons, the next shell is able to hold a maximum of 8 electro...
"The Nobel Prize in Physics 1921". nobelprize.org. Nobel Media AB 2013. Web. 24 Feb. 2014.
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...