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apr 20, 1871 - Mendeleev's Predictions
Description:
Mendeleev published predictions of not yet found elements with atomic mass and properties, according to the trends on his table
Added to timeline:
Development of Periodic Table
By
Karl Stücker
26 Nov 2018
0
0
432
Date:
apr 20, 1871
Now
~ 155 years ago
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