Hey, guys, let's take a look at the AL kind section now of hydrocarbons. So we say all kinds are hydrocarbons that contain at least one triple bond. They're sometimes referred to simply as unsaturated hydrocarbons, just like the Al Keene's. Now, the triple bonded carbons are connected to two electron groups, so either lone pairs or surrounding elements. Therefore, their hybridization are SP hybridized. Now here we're not laying down one pie bond were laying down two PI bonds to make a triple bond. And remember, every time we put down an extra bond we have to give up to hydrogen is in the process. So if we're putting down to bonds now, two extra bonds, that means that we're losing a total of four hydrogen. Because here, ethane originally had three hydrogen on each carbon. Now we have a triple bond there, so each carbon only gets one each, so we keep minus ing to every tell me at an extra bond. So for an al kind with one triple bond, the generic formula would be H two n minus two. Now notice two carbons, two carbons is F again for the prefix. And because we have a triple bond. The ending is ein, so this would be f fine here. Three carbons, the prefix we pro pope here because it ends with Ein. That's because we have a triple bond. So it's pro pine. The name sound a little bit funny, I know, but this is how we would name them now, now that we've seen this, let's see if you guys can attempt to do this question here. So now we're looking for basically a hydrocarbon. Its generic name. Nothing specific. It has one triple bond and nine carpets. So apply what we've learned so far and try to answer this question here. Come back, click on the next video and see how I best answer that question.