The problem of the large and growing variety of elements perplexed chemists, who attempted to bring order to the chaos. We learn about Döbereiner's triads, Pettenkofer and Dumas's correlations of multiples of atomic weights, Newlands's Law of Octaves, and Chancourtois's Telluric Screw. Kekulé's Karlsruhe conference brought order to some chemical chaos, and was the launching point for Dmitri Mendeleev and his periodic table, while Lothar Meyer almost beat Mendeleev for bragging rights. Mendeleev's close friend Alexander Borodin was a chemist AND composer, and we hear from guest Alan Rothenberg on Borodin's life and music.

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