Question

Explain demerits of mendeevs periodic table​

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.

Answer 2

Explanation:

• he was not able to give accurate position to hydrogen
• his periodic table was based on increasing atomic mass , but some element were not place according to the atomic mass
• he also not given position to isotopes