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What are exceptions to the octet rule?
The octet rule cannot be satisfied whose total number of valence electrons is an odd number
There are also molecules in which an atom has fewer, or more, than a complete octet in the valence electrons
Which elements are strict adherents to the octet rule?
C, O, N, and F
Which elements take an “Expanded Octet”
Any atom with more than 8 electrons, period 2 and below
Which elements qualify for the “Incomplete Octet”
Groups 1, 2, and 13
Formal Charge
The charge calculated for an atom in a Lewis structure on the basis of an equal sharing of bonded electron pairs
How to calculate formal charge
Formal charge = group number in periodic table - number of bonds - number of unshared electrons
What is the strongest type of bond?
A triple bond
What types of bonds have the most energy?
Triple bonds
