Question

Is $N{H_2}$ an amine?

Answer 1

One must know the functional group amine, how they are represented and which element they contain. Amines have $nitrogen$ as a central metal atom and other organic substituents are attached to it. They are derived from $ammonia$

Complete answer:
For the functional group amine, it should have a basic $nitrogen$ atom with a lone pair. Amines are organic derivatives of $ammonia$ $N{H_3}$ , in which one or more of the three $hydrogen$ is replaced by a $carbon$ atom. Amines are classified as primary or ${1^ \circ }$ , secondary or ${2^ \circ }$ and tertiary or ${3^ \circ }$ amines depending upon how many $carbon$ groups are attached to the $nitrogen$ atom. Let us understand these classification one by one-
Primary ( ${1^ \circ }$ ) amines- When in $ammonia$ group, one of the three $hydrogen$ atoms is replaced by an alkyl group or an aromatic group. It is known as primary amine. $\;methylamine$ is an example of primary amine.
Secondary ( ${2^ \circ }$ ) amines- In secondary amines two alkyl, aryl or both of these two organic substituents replace the $hydrogen$ atom of $ammonia$ molecule forming an amine. $dimethylamine$ is an example of secondary amine.
Tertiary ( ${3^ \circ }$ ) amines- When all of the three $hydrogen$ are replaced by organic substituents like an aryl, or aromatic group in the $ammonia$ molecule is known ad tertiary amines. $trimethylamine$ is a tertiary amine.
Apart from these three categories there is another type of amine called cyclic amine. It is either a secondary or tertiary amine present in an aromatic ring.
Let us look at the amine given to us. It is $N{H_2}$ and as we have learned earlier amine is represented as $N{H_2}$ so it is an amino group.

Note:
Amine and amide are two different functional groups. In an amide it has a carbonyl group attached to a $nitrogen$ group, whereas in amine the compounds which contain $nitrogen$ atoms are bonded in a hydrocarbon framework.