Answer
This hydrocarbon is an alkene. The Lewis structure is shown in the picture below.
Work Step by Step
This hydrocarbon is an alkene because it contains a double carbon-carbon bond. As the Lewis structure is drawn the way the formula is written, it can be seen that the second and the third carbon have only three bonds but a carbon should have four. Thus, there should be double bond between second and third carbon. This makes it an alkene.
