Question

Questions

(a) What was the basis of Mendeleev’s classification of elements ?

(b) Discuss two merits and demerits of the Mendeleev’s periodic table

(c) State Mendeleev’s periodic law​

Answer 1

Mendeleev classify the elements on the basis of atomic weights.

Mendeleev stated the law of chemical periodicity.

The physical and chemical properties of the elements are a periodic function of their atomic weights, i.e. when the elements are arranged in the increasing order of their atomic weights, the elements with similar properties are repeated after certain regular intervals.

This is called Mendeleev’s Periodic Law.