By Steven Scott and Bryan Denin

 Born October 7, 1885  Died November 18, 1962  Received Nobel Prize in 1922  Developed Bohr Model of the atom  Attended University of Copenhagen

 Attended Gammelholm Latin School  Attended Copenhagen University  Won over 8 notable awards  Founded the Institute of Theoretical Physics at Copenhagen University

 Introduced in 1913  Atom shown as small, positively charged nucleus  Surrounded by electrons that orbit around the nucleus

 Suggested heavier atoms have more protons in the nucleus  Each orbit could only hold a certain number of electrons  After that orbit is full, next level would have to be used. This gives the atom a shell structure  Bohr used the solar system as a reference on how electrons orbit the nucleus

 Uranium-235 could construct the atomic bomb  Did not believe you could extract enough of the U-235  Did not show an opinion on the possible effects the nuclear energy could have

 The Bohr model gives for a system where two charged points orbit each other  The Bohr formula properly uses the reduced mass of electron and proton

 Electrons orbit the nucleus in orbits that have a set size and energy  The energy of the orbit is related to its size  Radiation is absorbed or emitted when an electron moves from one orbit to another

 Each element gives off a specific colour of light (emission spectra). It is unique to each element This allowed Bohr to produce his model of the atom. To explain this emission spectra, he suggested that electrons occupy shells or orbitals.  Bohr based his model on the energy (light) emitted by different atoms

 Gives an incorrect value for the ground state orbital angular momentum  Poor predictions about the spectra of larger atoms  Does not explain fine structure and hyperfine structure in spectral lines  Fails to provide any understanding of why certain spectral lines are brighter than others

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