Final answer:
The compound CH3NH2 is named Methylamine, which is a primary amine with a single methyl group attached to its nitrogen atom.
Step-by-step explanation:
The name of the compound CH3NH2 is Methylamine. To name this compound, we identify the alkyl group attached to the nitrogen atom. Since there is only one carbon in the alkyl group, it is a methyl group. The compound is also a primary amine because it has one alkyl group attached to its nitrogen atom. Thus, the correct name for CH3NH2 is Methylamine, which is option 1.