March 6, 1869 –
Dmitri Mendeleev presented the first periodic table to the Russian Chemical Society on this date in a presentation entitled “The Dependence between the Properties of the Atomic Weights of the Elements.” He left gaps in his charts and predicted the addition of three more elements in the near future.
Mendeleev’s predictions were right, and he is credited with writing the first periodic table.
And so it goes
The Haus of Dcaligari 