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1 jan 1869 ano - Dimitri Mendeleev

Descrição:

Dimitri Mendeleev knew about 63 elements. He arranged the elements into their atomic weigh. He was able to make the first full version of the periodic table, leaving gaps for the elements he did not yet know of.

Adicionado na linha do tempo:

Data:

1 jan 1869 ano
Agora
~ 155 years ago