How it can be proved that the basic structure of the Modern Periodic Table is based on the electronic configuration of atoms of different elements?

The electronic configuration of an element is 2, 8, 4. This means that the element has two electrons in its first energy level (K shell), eight electrons in its second energy level (L shell), and four electrons in its third energy level (M shell). The element with this electronic configuration is Germanium (Ge). (a) Group and Period in the Modern Periodic Table: Germanium belongs to Group 14 (formerly IV A) and Period 4 of the Modern Periodic Table. (b) Name and Physical Property: The name of the element is Germanium (Ge). One physical property of Germanium is that it is a metalloid, which means it exhibits some properties of metals and some properties of nonmetals.