If you are talking about Dmitri Mendeleev, he was the first to come up with the first periodic table and the periodic law.
His bugers were wiped on me
He made flashcards of elements and organized them in order of increasing atomic mass.
Dmitri Mendeleev created the first periodic table according to atomic mass
Dmitri Mendeleev was the first scientist to create a periodic table of the elements similar to the one we use today. You can also see Mendeleev's original table (1869).
Dmitri Mendeleev was the first scientist to create the periodic table
Arsenic did not create the first periodic table. The first periodic table was created by Dmitri Mendeleev, a Russian chemist, in the 1860s. Other scientists had organized elements in other ways prior to the invention of Mendeleev's periodic table, but the other methods were criticized and did not catch on.