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The Value of Completeness: How Mendeleev Used His Periodic System to Make Predictions

Published online by Cambridge University Press:  01 January 2022

Abstract

Dmitrii Mendeleev’s periodic system is known for its predictive accuracy, but talk of its completeness is rarer. This is surprising because completeness (polnost’) was a quality that Mendeleev saw as important for a systematization of the chemical elements. Here, I explain how Mendeleev’s valuing of completeness influenced the development of his periodic system. After introducing five indicators of its completeness, I zoom into one in particular: Mendeleev’s inclusion of a schematic row of oxides. I then show how it guided Mendeleev’s predictions of indium and ekaboron, which suggests that the valuing of completeness was instrumental for making predictions.

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Type
Research Article
Copyright
Copyright © The Philosophy of Science Association

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