How many total valence electrons must be shown in the Lewis structure of C2H6S? 20 30 10 9 Question 30 ( 2 points) What does the octet rule say? Atoms with fewer than 8 electrons are unreactive. Atoms are most stable when the number of protons and neutrons is equal. The most reactive elements are those that have a filled valence shell. Atoms will gain, lose, or share enough electrons to reach a noble gas electron configuration