Question

I need demerits and merits of pf medeleev periodic table , answer in brief

Answer 1

Answer:

Demerits of Mendeleev Periodic Table. He was unable to locate hydrogen in the periodic table. Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be discovered was not predictable.

Answer 2

Answer:

see the science book of any board.

you will get it in deep...