Question

What is the limitation of law discussed in the given paragraph?

a) This law could not explain the position of isotopes

b) This law proved to be true for elements only up to calcium.

c) This law could define a total of 9 elements only

d) This law could not define the position of hydrogen.​

Answer 1

Answer:

LIMITATIONS OF Mendeleev's Periodic Table :

Position of Hydrogen => Position of hydrogen in the perodic table is Uncertain , Because hydrogen is placed in 1 A group with Alkali metals .

Position of isotopes => isotopes haven't been given separate place in perodic table .

Cause of periodicity => Mendeleev could not explain the cause of periodicity .

Separation of similar elements => some dissimilar elements have been placed together .

Answer 2

Answer:

c this law had total 9 element only

Explanation:

this is Johann Dobereiners law