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jan 1, 1869 - Mendeleyev

Description:

Arranged the order of elements in order of increasing relative atomic mass.
Successfully predicted the properties of 3 elements which were not discovered by the moment.

Added to timeline:

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ByMIGUEL ANGEL PEREZ DEL VALLE
3 Dec 2018
0
0
254

Date:

jan 1, 1869
Now
~ 155 years ago
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