Question

Mendeleev's Periodic table
The Russian scientist Dmitri
& his periodic law​

Answer 1

Answer:

Mendeleev created his table on the basis of atomic mass

periodic law:.

the elements are the periodic function of their atomic masses....

Answer 2

hey mate your answer is:

Mandleeve periodic law states that the physical and chemical properties of the element are the periodic function of their atomic masses this arrangement enabled mendleeve to arrange 63 elements known at that time

However there were certain defects like he could not prove arrangement of isotopes , rare earth metals

These defects were removed by Henry Mosely

whose periodic table was based on atomic number

Hope this helps