Question

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

Answer 1

in the modern periodic table the elements which have same no.of valence electrons in their valence shells they are kept in same group

If they have sane no.of shells then they are kept in same period

Answer 2

Explanation:

In the modern periodic table, atoms with similar electronic configurations are placed in the same column. In a group, the number of valence electrons remains the same.

Elements across a period show an increase in the number of valence electrons.