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dec 31, 1859 - John Newlands identified the "Law of Octaves" that showed the pattern of atomic structure of elements. He also arranged elements in order of atomic weight.

Added to timeline:

24 Oct 2017
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A Timeline of the Atomic HIstory
Dalton's atomic theory was the first attempt to describe all...

Date:

dec 31, 1859
Now
~ 159 years ago

Images:

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