An atom's tendency is to become stable. What does this mean? A. The electrons all move to one electron shell. B. The atom gains or loses neutrons to match the number of protons. C. The atom gains or loses electrons to match the number of protons. D. The atom gains or loses electrons so its outer electron shell is full.
The answer is D. To put it simply, all atom wished to become stable. The only way for that is to obtain an octet structure where the outermost shell would have 8 electrons, thus being full.
