The presentation of the Periodic Table by Dimitri Mendeleev: 6 March 1869.
Dmitri Mendelev was a Russian scientist who created the first modern periodic table of elements.
D. Mendelev
Dmitri Mendeleev is credited with developing the periodic table of elements in 1869. He organized the elements based on their atomic mass and properties, predicting the existence of elements yet to be discovered. His periodic table laid the foundation for our modern understanding of the chemical elements.
He made the first periodic table.
For a better understanding and way to organize the elements. Research Mendelev.
he changed it
This is from wikipedia: Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring ("periodic") trends in the properties of the elements.
a scientist and the creator of the periodic table.
Dimitri Mendeleev
if you mean who: dmitri mendelev
mendelev arranged the elements in the periodic table in the asending order of the mass number of elements.
1869, after the Dimitri Mendeleev discovery.