Editing Bohr model (section)

===Bohr's previous work===
Bohr completed his PhD in 1911 with a thesis 'Studies on the Electron Theory of Metals', an application of the classical electron theory of [[Hendrik Lorentz]]. Bohr noted two deficits of the classical model. The first concerned the [[specific heat]] of metals which [[James Clerk Maxwell]] noted in 1875: every additional degree of freedom in a theory of metals, like subatomic electrons, cause more disagreement with experiment. The second, the classical theory could not explain magnetism.<ref name=PaisInwardBound/>{{rp|194}}

After his PhD, Bohr worked briefly in the lab of [[JJ Thomson]] before moving to Rutherford's lab in [[University of Manchester|Manchester]] to study radioactivity. He arrived just after Rutherford completed his proposal of a compact nuclear core for atoms.  [[Charles Galton Darwin]], also at Manchester, had just completed an analysis of alpha particle energy loss in metals, concluding the electron collisions where the dominant cause of loss. Bohr showed in a subsequent paper that Darwin's results would improve by accounting for electron binding energy. Importantly this allowed Bohr to conclude that hydrogen atoms have a single electron.<ref name=PaisInwardBound/>{{rp|195}}<!-- ref covers paragraph-->