Question

5. (a) Who proposed Modern Periodic Law ?
(b) What was the basis of arranging the elements in it?
(c) State the Modern Periodic Law.
(please give known answer class x)​

Answer 1

Answer:

(a) Mendeleev

(b)Elements are arranged on the basis of increasing order of atomic numbers. The horizontal rows in the periodic table are called Periods and the vertical columns are known as the Groups. The elements in the Modern Periodic Table are arranged in 7 Periods and 18 Groups

(c)

Answer 2

Answer:

Mendeleev proposed modern periodic law