When the radical is on the end, the name reverts back to the hydrocarbon that was used to form the radical. For example, methyl is a radical of the one-carbon alkane, methane. So if the halogen chlorine is added to methane, and the halogen is named first, the name is chloromethane. If bromine is the halogen, the name is bromomethane. If the radical is a two-carbon radical and the halogen is fluorine, the name of the compound is fluoroethane, and so on. Illustrated in Figure 8.7 are the names and structural formulas for some one, two, and three-carbon alkyl halides.