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Dmitri Mendeleev

Creator of the Periodic Table

Dmitri Ivanovich Mendeleev (1834–1907) revolutionized chemistry by formulating the Periodic Table of Elements. His system not only organized known elements but predicted the discovery of new ones with remarkable accuracy.

Contributions

• Periodic Law — Stated that chemical properties of elements are periodic functions of atomic weight (later atomic number).
• Predictions — Correctly predicted properties of undiscovered elements such as gallium (eka-aluminum) and germanium (eka-silicon).
• Solutions and Mixtures — Studied phase transitions and critical temperature.

Legacy

Mendeleev’s periodic law became the unifying framework of chemistry, guiding research and discovery. His vision combined empirical order with predictive power, a hallmark of great science.

Facts

• Born in Tobolsk, Siberia.
• Published the periodic table in 1869.
• Predicted missing elements.
• Honored by element 101, Mendelevium.