Question

Dmerits of mendeleev periodic table in points.

Answer 1

Answer:

Demerits of Mendeleev's Periodic Table : (a) Mendeleev arranged elements in the ascending order of their atomic masses. There was no fixed position for hydrogen in his periodic table, as it resembled alkali metals as well as halogens. (b) Elements of higher atomic mass were placed before elements of lower atomic mass.

Explanation:

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Answer 2

Answer:

a) mendalleve arranged elements in the ascending order of thrre atomic masses .there was no fixed position for hydrogen in his periodic table,as it resembled alkali metals as well as halogen

b) elements of higher atomic masses were placed before elements of lower atomic masses

c) elements having different properties were placed in the same sub