who made the periodic table

The periodic table was primarily created by the Russian chemist Dmitri Mendeleev in 1869. He arranged the known chemical elements by increasing atomic weight and noticed that elements with similar properties appeared at regular intervals, or periods. Mendeleev's table included gaps for elements that were yet to be discovered, and he even predicted the properties of some of these unknown elements, which later proved accurate. While others like Johann Döbereiner, John Newlands, and Julius Lothar Meyer contributed to early versions and concepts of element classification, Mendeleev is credited with developing the periodic table in its modern form that laid the foundation for the current understanding of elemental relationships.