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apr 27, 1862 - The Periodicity of Elements (Dechancourtois)

Description:

He was the first scientist to see the periodicity of elements when they were arranged in order of their atomic weights.
He published his paper, but he didn't publish his actual graph with the irregular arrangement.

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ByMICHELLE MORGAN SILLER
29 Nov 2018
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Date:

apr 27, 1862
Now
~ 163 years ago
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