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jan 1, 1913 - Niels Bohr

Description:

Bohr modified Rutherford's model of the atom by stating that electrons moved around the nucleus in orbits of fixed sizes and energies. Electron energy in this model was quantized, meaning electrongs could not occupy values of energy between fixed energy levels.

Added to timeline:

Periodic table timeline

ByTiona Nguyen
9 Feb 2020

Date:

jan 1, 1913
Now
~ 111 years ago
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