The Octet Rule refers to the tendency of Atoms to prefer to have eight electrons in the Valence Shell. When Atoms have fewer then 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 main group electrons (elements not in transition -metal or inner transition metals block an Octet in these atoms correspond to an electron configuration ending with 82p6. Octet Rule characteristic are a stable arraignment which can also be corresponded by its own electrons and some electrons which are shared , thus an atom continues to form Bonds until an Octet of electrons is made .
An Example of this Rule .
The fulfillment of this rule can be observed in unstable electrons ; such as an electron constructed of 7 Valence, and another electron which also has 7 valence . I they each shared the seventh electron co -valence would allow the fulfillment of the Octet Rule making them both stable .
F-OO-OO-OO-O
CI-OO-OO-OO-O
Notice that the last electron when shared by the atoms Chlorine and Florine produce the Octet Rule ; of course these electrons must surround both atoms to be appreciated nun the less stability is achieved through co-convalescence.of the seventh electron shared .
References
http://surfguppy.com/bonds/energy/octet-rule-electron-configuration/
