Hydrogen cyanide (HCN) and hydrogen isocyanide (HNC) have the same elemental composition except H is bonded to carbon in one and to nitrogen in the other. Which statement regarding the Lewis structures of these molecules is not correct?
A) Both have 10 valence electrons.
B) The formal charges are zero for all the atoms in only one of these molecules.
C) The most electronegative element has a formal charge of -1 in one of these molecules.
D) The Lewis structures predict that HCN is the more stable molecule.
E) The formal charges sum to zero in both molecules.
Correct Answer:
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