Niels+Bohr+Hall

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Niel Bohr

1. Neil’s Henrik David Bohr- was born in Copenhagen on October 7, 1885, as the son of Christian Bohr, Professor of Physiology at Copenhagen University, and his wife Ellen, //née// Adler. Neil’s, together with his younger brother Harald (the future Professor in Mathematics), grew up in an atmosphere most favorable to the development of his genius father was an eminent physiologist and was largely responsible for awakening his interest in physics while still at school, his mother came from a family distinguished in the field of education. 2. When did research take place? What else was happening in the world at this time? The research took place between the years 1911-1915. An event that happened during this time was Ernest Rutherford was conducting experiments on the atom.

3. In the autumn of 1911 he made a stay at Cambridge, where he profited by following the experimental work going on in the Cavendish Laboratory under [|Sir J.J. Thomson's] guidance, at the same time as he pursued own theoretical studies. In the spring of 1912 he was at work in [|Professor Rutherford's] laboratory in Manchester

4. Some of his equipment used was mainly his doctorate degree. He used what he learned in previous years about the atom to help discover his theory. This atomic theory was a combination of Rutherford’s work and ideas of the atom, with Planck’s Quantum Theory. Rutherford’s atomic theory described an atomic model with all the mass concentrated in a nucleus with electrons circling the nucleus in a fixed orbit.

5. The Bohr Model is probably familiar as the "planetary model" of the atom illustrated in the adjacent figure that, for example, is used as a symbol for atomic energy (a bit of a misnomer, since the energy in "atomic energy" is actually the energy of the nucleus, rather than the entire atom). In the Bohr Model the neutrons and protons (symbolized by red and blue balls in the adjacent image) occupy a dense central region called the nucleus, and the electrons orbit the nucleus much like planets orbiting the Sun (but the orbits are not confined to a plane as is approximately true in the Solar System). Bohr described the way atoms emit radiation by suggesting that when an electron jumps from an outer orbit to an inner one, that it emits light. Later other physicists expanded his theory into quantum mechanics. This theory explains the structure and actions of complex atoms.

6. What were main points of this theory? Create a numerical list of points. i. electrons can only occupy certain orbits or shells in an atom. Each orbit represents a definite energy for the electron sin it ii. Light is emitted by an atom when an electron jumps from one of its allowed orbits to another. Since each orbit represents a definite electron energy, this electron jump, or transition, represents definite energy jump. This change in electron energy leads to emission of light of a definite energy or wavelength

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8. There was nothing I could find Substantial wrong with his model

@http://videos.howstuffworks.com/hsw/5787-niels-bohrs-atomic-model-video.htm

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