aug 30, 1927 - Werner Heisenberg's model
In 1927, Werner Heisenberg proposed the "uncertainty principle" which states that it's impossible to determine the location and speed of a particle at the same time. With that knowledge, he made a 3D atomic model of Bohr's model called "cloud" model.
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