Question

on what bases mendeleev classified element​

Answer 1

Answer:

Mendeleev classified elements on the basis of atomic mass number

Answer 2

In 1869, Mendeleev classified the then known 56 elements on the basis of their physical and chemical properties in the increasing order of the atomic masses, in the form of a table. Mendeleev had observed that properties of the elements orderly recur in a cyclic fashion...