What group has a full s sublevel and a full p sublevel (total of 8 valence e-) in its highest energy level (with one exception)?
Group VIII or the inert gases, or noble gases.
All of the elements of this family of elements are mainly inert and undergo few or no chemical reactions.
All of the elements of this group except Helium have 8 valance electron which results in a stable filled electron shell. Helium has only 2 valence electrons but these two electrons fill the first shell providing Helium with an analogous stable structure to the other VIII A elements.