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27 abr 1862 año - The Periodicity of Elements (Dechancourtois)

Descripción:

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.

Añadido al timeline:

fecha:

27 abr 1862 año
Ahora mismo
~ 163 years ago