Question

(a) State Mendeleev’s periodic law.

(b) Describe the demerits of Mendeleev’s periodic table?​

Answer 1

Answer:

(a) the law that the properties of the elements are periodic functions of their atomic numbers. Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.

(b) 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

Ans1: the law that the properties of the elements are periodic functions of their atomic numbers. Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.

Answer:2 Explanation:Demerits of Mendeleev's Periodic Table : ... 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.