Question

how it can be proved that the basic structure of the modern period table is based on the electronic configuration of atoms of different elements​

Answer 1

1.Elements are organized by period and group, with the period corresponding to the principle energy level, and the group relating to the extent the subshells are filled.

2.The properties of an atom relate directly to the number of electrons in various orbitals, and the periodic table is much like a road map among those orbitals such that chemical properties can be deduced by the position of an element on the table.

3.The electrons in the outermost or valence shell are especially important because they can engage in the sharing and exchange that is responsible for chemical reactions.