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July 31, 2021
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Neil Bohr discovers the order of electrons in their shells (4h 39min, jan 1, 1913 y – 16h 4min, dec 31, 1913 y)

Description:

Atom with positively charged nucleus and negative neutrons circling the nucleus in an orbit, similar to the solar system.

Added to timeline:

26 Dec 2017
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History of the Periodic Table

Date:

4h 39min, jan 1, 1913 y
16h 4min, dec 31, 1913 y
~ 12 months

Images:

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