(a)What are noble gases? What is the characteristic of the electronic configuration of noble gases? (b)What is the cause of chemical bonding (or chemical combination) of atoms of elements?

(a) Noble gases or inert gases are those which do not combine with other elements and they are in group

1. They are unreactive stable elements. Helium, neon, argon, krypton, xenon and radon are called noble gases. The electronic configuration of noble gases will have 8 electrons in the outermost shell except helium. Therefore they are the most stable.

(b) Atoms form chemical bonds to achieve stability by acquiring inert gas electron configuration.