Who decided on the layout of the current table of periodic elements?

The layout of the current Periodic Table of elements was primarily developed by Dmitri Mendeleev in 1869, who organized the elements based on their Atomic Mass and properties. Subsequent modifications were made as the atomic structure was better understood, particularly with the introduction of atomic number by Moseley in 1913. Today’s periodic table is arranged by increasing atomic number and groups elements with similar chemical properties together. Various scientists and organizations have contributed to its refinement over time, but Mendeleev is often credited as the primary architect of its modern form.