Question

What are the limitations of modern periodic table ?

Answer 1

a really nice question  my friend !.....so  limitation of modern periodic table is that :- 



(a) Position of hydrogen: It could not assign a correct position to hydrogen in the table.
(b) The lanthanides and actinides are not placed in the main body of the table.
 (c) Position of isotopes: There are no separate positions for isotopes of an element.


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Answer 2

Answer:

1. The Position of Hydrogen is not satisfactory as its properties are similar to both Group 1 and Group 17

2. No separate position given for Isotopes

3. It fails to accommodate Inner transition elements (Lanthanides and Actinides) in its main body.