Which scientist organized the periodic table based on atomic number?

Answer 1

The scientist who organized the periodic table based on atomic number is Glenn T. Seaborg. He rearranged the periodic table in 1940, placing elements in order of increasing atomic number rather than atomic mass, which was the method used by Dmitri Mendeleev when he originally created the periodic table in 1869. Seaborg's work helped to clarify the relationships between elements and led to the modern arrangement of the periodic table that we use today.