Question

1. What are the limitations of Mendeleeff's periodic table? How could the modem periodical overcome the limitations of Mendeleeff's table2 ?​

Answer 1

Answer:

given in ncert kindly refer to it . it has been mentioned clearly .

Answer 2

Answer:

limitations or demerits -

Explanation:

1. Position of hydrogen

2. The whole number of atomic mass of Cobalt and Nickel is same. Therefore there was problem regarding their sequence

3. Isotopes were discovered after long time of Mendeleev table. Thus there was no space for isotopes.

all the problems occurred due to he arranged elements in their increasing order of atomic mass not atomic number.