Question

dmerits of meendeelev periodic table​

Answer 1

Explanation:

Demerits of Mendeleev periodic table are:-

I) position of isotopes could not be explained.

ii) no fixed position for hydrogen .

iii) wrong order of atomic masses of some elements could not be explained.

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Answer 2

Answer:

1. There was a regular gradation in physical and Chemical properties of elements.
2. The group of number of an element indicates highest oxidation state that it can attain.

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