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jan 1, 1913 - Niels Bohr : He said that the nucleus lies in the centre of the model and is made up of a certain number of protons and neutrons. Also,for each of the outer layers are made up of a certain amount of electrons.

Added to timeline:

10 Sep 2017
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0
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Atomic Timeline

Date:

jan 1, 1913
Now
~ 105 years ago
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