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Niels bohr niels bohr atomic model3/15/2024 ![]() However, the idea of quantized angular momentum has been retained. Modern atomic theory does not allow subatomic particles to be treated in the same way as large objects, and Bohr's reasoning is somewhat discredited. He won the Nobel Prize in Physics in 1922. Niels Bohr was born in Copenhage and best known for his work in atomic theory. The element bohrium is named in his honor. The wavelength of a particle is given by h/ mv, so nh/ mv = 2π r, which leads to mvr = nh/2π. Bohr and his wife Margrethe had six children, one of whom, Aage Niels Bohr, became a very successful physicist and also won a Nobel Prize in Physics. nλ = 2π r, where λ is the wavelength and n a whole number. Each orbit has to have a whole number of wavelengths around it i.e. The idea of quantized values of angular momentum was later explained by the wave nature of the electron. This theory gave good results in predicting the lines observed in the spectrum of hydrogen and simple ions such as He +, Li 2+, etc. ![]() Each permitted value of n is associated with an orbit of different radius and Bohr assumed that when the atom emitted or absorbed radiation of frequency ν, the electron jumped from one orbit to another the energy emitted or absorbed by each jump is equal to hν. can only have certain values, each of which is a multiple of n. ![]() This means that the angular momentum is quantized, i.e. ![]() Bohr proposed that electrons could only occupy orbits in which this angular momentum had certain fixed values, h/2π, 2 h/2π, 3 h/2π,… nh/2π, where h is the Planck constant. The angular momentum of the electron would then be mvr. He assumed that a single electron of mass m travelled in a circular orbit of radius r, at a velocity v, around a positively charged nucleus. The theory published in 1913 by Niels Bohr to explain the line spectrum of hydrogen. ![]()
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