Modern periodic law states that “The physical and chemical properties are the periodic functions of their electronic configuration”.
The electronic configuration of the atoms of element represent the position of the atom in periodic table.
The electronic configuration of the atoms helps to predict the physical and chemical properties of the elements.
It gives the information about the reactivity, metallic nature and all physical and chemical properties of the element.
So, by only the electronic configuration of the element, we predict all the prop-erties of that element. Hence I appreciate the role of electronic configuration of the atoms of elements in periodic classification.