Question

outer shell octet configuration is observed for the elements of the group

Answer 1

8th group elements have octet electronic configuration Nobel gases ..
.helium, neon , argon, krypton, xenon,radon....
hope this helps you...

Answer 2

The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When atoms have fewer than eight electrons, they tend to react and form more stable compounds. When discussing the octet rule, we do not consider d or f electrons. Only the s and p electrons are involved in the octet rule, making it useful for the representative elements (elements not in the transition metal or inner-transition metal blocks). An octet corresponds to an electron configuration ending with s2p6.