Question

(i) What are the demerits of Mendeleev's periodic table?
(ii) What.​

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. ... Later on, isotopes of elements were found which violated Mendeleev's periodic law.

Answer 2

Answer:

ok but where is your second question

Explanation:

demerits of Mendeleev periodic tables are for some elements in Mendeleev periodic table have not be arranged in the increasing order of their atomic masses for example Cobalt and Nickel even to Copper has higher atomic masses then it is placed before the conical in the table second hydrogen form compound with similar to group 1 elements however it also come similar diatomic molecules as group 7 elements it could be not assignable position in the table third isotope pose a challenge to Mehndi leaves table for example chlorine has major isotopes of chlorine 65 and chlorine 37 hence they can be placed separately in the accordance with their masses b35 AMU and 37 m u or both of them could be placed together on into the similar chemical properties