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Significance The number and diversity of substances constituting the chemical space triggered, in two important steps, the convergence of the periodic system toward a stable backbone structure eventually unveiled in… Click to show full abstract
Significance The number and diversity of substances constituting the chemical space triggered, in two important steps, the convergence of the periodic system toward a stable backbone structure eventually unveiled in the 1860s. The first step occurred in 1826, and the second was between 1835 and 1845. Interestingly, the salient features of the periodic system of the 1860s can be detected as early as the 1840s, even when considering the effect of disagreement regarding the determination of atomic weights. The methods presented here become instrumental to study the further evolution of the periodic system and to ponder its current shape.
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2022
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