Question

state demerits of mendeleev's periodic table​

Answer 1

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$\sf\red{⟶}$He was unable to locate hydrogen in the periodic table.

$\sf\red{⟶}$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.

$\sf\red{⟶}$Later on, isotopes of elements were found which violated Mendeleev’s periodic law.

Answer 2

Answer:

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Explanation:

see the attachment

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