question_answer 21)

 How does the electronic configuration of an atom relate to its position in the modern periodic table?                                                             

Answer:

The electronic configuration of an atom helps us to predict the position of the atom in the periodic table.                                                            (i) The number of the outermost shell corresponds to the period. For example, if the periodic table. second outermost shell, it belongs to second period and so on.                    (ii) The number of electrons in the outermost shell corresponds to group in the periodic table.