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Today in History: Dmitri Mendeleev completes first periodic table design

3/1/2026

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Summary

Story summary

On March 1, 1869, Russian chemist Dmitri Mendeleev completed his first periodic table, organizing elements by atomic number and properties. This groundbreaking work not only corrected existing misconceptions about elements but also predicted the properties of undiscovered ones. Mendeleev's periodic law remains fundamental in chemistry and has influenced various scientific fields.

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Story summary

On March 1, 1869, Russian chemist Dmitri Mendeleev completed his first periodic table, organizing elements by atomic number and properties. This groundbreaking work not only corrected existing misconceptions about elements but also predicted the properties of undiscovered ones. Mendeleev's periodic law remains fundamental in chemistry and has influenced various scientific fields.