Question

limitations of debereiner classification limitation of mendlev table

Answer 1

limitations of Dobereiner triads was that it was limited to only calcium there is light metal. also he fail to arrange all the known elements in form of traits of elements having similar chemical properties. Dobereiner could identify only three States from the elements known at that time so his classification of elements was not much successful

Answer 2

LIMITATIONS OF DOBEREINER'S CLASSIFICATION-

Limitations of dobereiner classification was that it failed to arrange all the then known elements in the form of triads of elements having similar chemical properties. He could only identify 3 triads from the elements known at that time. So his classification of elements was not much successful.

LIMITATIONS OF MENDELEEV'S PERIODIC TABLE-

The position of isotopes could not be explained.

wrong order of atomic masses of some elements could not be explained.

A correct position could not be assigned to hydrogen in periodic table.