Question

what are the merits and demerits of Mendeleev periodic table

Answer 1

the demerits of Mendeleev periodic table is that-

1) Hydrogen place is not stable in his table

2) noble /inert gases is show in his table

3) he arrange elements in his periodic table according to their masses

the merits of Mendeleev periodic table is that-

1) he divided his that in 6 period and 8 groups

2) he left many blank spaces in his table it means that he know that those elements are not discover are placed in his blank space

Answer 2

Merits of Mendeleev Periodic Table :-

1.He left blank  Places which help scientist to discover new element

2.When Noble gasses was discovered Hel could add  it to periodic table without any major changle

3.He predicted the property of new element

Demerits of Mendeleev Periodic Table :-

1. Couldn't explain position of Hydrogen

2.Couldn't answer the question "Can we have an element with atomic mass 3 between Hydrogen and Helium

3 He placed cobalt before Nickel though Cobalt has more mass

HOPE IT HELPS YOU!!