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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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25 oct 1829 año - Johann Dobereiner recognizes triads of elements and comes to the conclusion that components of the middle element could be predicted by the components of the other two.

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25 oct 1829 año
Ahora mismo
~ 196 years ago