<P> Noble gas configuration is the electron configuration of noble gases . The basis of all chemical reactions is the tendency of chemical elements to acquire stability . For some main group elements, chemical bond formation often results in a complete electronic configuration resembling a noble gas . </P> <P> W. Kossel and Gilbert N. Lewis saw that noble gases did not have the tendency of taking part in chemical reactions under ordinary conditions . On the basis of this observation they concluded that atoms of noble gases are stable and on the basis of this conclusion they proposed a theory of valency known as "Electronic Theory of valency" in 1916: </P> <P> During the formation of a chemical bond, atoms combine together by gaining, losing or sharing electrons in such a way that they acquire nearest noble gas configuration . </P>

What is the noble gas electronic configuration for ba