feb 28, 1912 - Niels Bohr's model
In 1912, Niels Bohr created an atom model that was similar to Rutherford's. But the difference is, his model stated that electrons moved in specified energy levels (electron shell). He also stated that electrons produced spectrum lines when they moved.
Porter. Victoria. "Atom Models Timeline". Prezi. Prezi. 9 March 2011. 3 October 2017
jujube1999. "Atomic Model Timeline". TimeToast. Timetoast. 2017. 3 October 2017
Added to timeline:
Atomic Model Timeline