Question

Sort and suit point defect of Mendeleeve table

Answer 1

3 limitations of Mendeleeve's periodic table:

1> atomic masses of elements do not increase in a regular manner. Elements with slightly higher atomic masses were placed in front of those with lower atomic masses.

2> Hydrogen resembled Halogens as well as Alkaline metals,hence hydrogen was not given a proper place.

3> Isotopes of almost all elements posed a challenge.