Question

why noble gases show electronic configuration

Answer 1

Writing out an electron configurationfor an element is a great way to look at the distribution of electrons in an atom. Depending on the element, it may be very long. Because of this, scientists have developed a shorthand notation that involves using a noble gas to represent electrons that are not valence electrons.

Answer 2

Here is your answer dear,

This means that they have 8 electrons in their outermost shell. It is because of the full outer shell that the noblegasses are not reactive.

Hope this helps you. Good night