Question

What is merits and demerits of Mendeleev's periodic table?

Answer 1

Answer:

The demerits of the periodic table given by Mendeleev are :

1. He could not place the element Hydrogen in appropriate position in the periodic tabular form.
2. There was no regular trend in increasing of atomic mass when moved along the elements.
3. More elements was yet to be known.

Merits of Mendeleev Periodic Table:

1. Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.