Question

Modern periodic law is
0
The physical and chemical properties of the
elements are periodic function of their atomic
numbers
(2) The physical and chemical properties of the
elements depend upon the energy of the
electrons
(3)
The physical and chemical properties of the
elements depend upon atomic wt.
(4) None of these​

Answer 1

Answer:

Modern Periodic Law states that:-

the physical and chemical properties of an element depends on the periodic function of their atomic numbers.

Answer 2

Answer:

first option ...............