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apr 20, 1913 - Bohr

Description:

Bohr studied the Rutherford model and discovered it was incorrect; instead, he modified it "...by requiring that the electrons move in orbits of fixed size and energy."

[Bohr Atomic Model, abyss.uoregon.edu/~js/glossary/bohr_atom.html. Accessed 29 Sept. 2017.]

Bohr created an atomic model that showed how the nucleus was positively charged, and the electrons "orbiting" it were negatively charged.

http://abyss.uoregon.edu/~js/images/classical_atomic_orbit.gif

[image of model from the same source]

Added to timeline:

29 Sep 2017
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Atomic Model Timeline (click on the names)
science lab assignment

Date:

apr 20, 1913
Now
~ 105 years ago
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