Question

plzz explain me following lines..


it is now recognized that the Periodic Law
is essentially the consequence of the periodic
variation in electronic configurations, which
indeed determine the physical and chemical
properties of elements and their compounds.​

Answer 1

Answer:

look periodic law says that periodic elements are properties of their periodic number so according to periodic table it can be decided that what are the physical and chemical properties of the elements with their increasing atomic weights. for example if you take like size it increases from top to bottom and decreases from moving left to right so it is giving us the information about their physical property now ship talk about the chemical property you can take a example in halogen family the electronegativity decreases from top to bottom.