The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (c) Which carbon—carbon bond is the strongest one?

Video transcript

Hey everyone, we're given the following partial LewiS structure and we're told that when the structure is completed, all of the atoms except hydrogen will obey the octet rule. Which of the three labeled carbon nitrogen bonds in the molecule is the weakest first. Let's go ahead and complete our structure. We know that carbon will have hydrogen is connected to it in order to complete its octet and to complete nitrogen octet, we have to add a lone pair onto each nitrogen. Now in regard to covalin bond strength, we've learned that the triple bond is the strongest, followed by our double bonds. And lastly, our weakest is going to be our single bonds. So to answer this question, our carbon nitrogen bond, labeled as number two is going to be the weakest since it is a single bond. So I hope that made sense. And let us know if you have any questions.