What scientific field is Dmitri Mendeleev chiefly associated with?

What scientific field is Dmitri Mendeleev chiefly associated with? Chemistry.

Dmitri Mendeleev was a Russian chemist best known for developing the periodic table of the chemical elements. His 1869 arrangement grouped elements according to recurring chemical properties and atomic weights, allowing him to leave gaps for substances not yet known.

Mendeleev's work was chiefly chemical, although his investigations crossed into physics, meteorology, geology, hydrodynamics, petroleum, and industrial technology. Those wider interests can make the question seem broader, but chemistry remains his canonical field and the discipline most closely attached to his name.

His achievement was not simply listing the elements. He used the table to predict the properties of “eka-aluminium,” “eka-boron,” and “eka-silicon,” later identified as gallium, scandium, and germanium. Their discoveries helped establish the predictive power of chemical periodicity.

Mendeleev also helped found the Russian Chemical Society in 1868 and held academic posts connected with chemistry in Saint Petersburg.