Which functional group contains both a nitrogen atom $N$ and an oxygen atom $O$?

• A. $\mathrm{Alkyne}$
• B. $\mathrm{Alkene}$
• C. $\mathrm{Amide}$
• D. $\mathrm{Ether}$

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the question is asking to identify a functional group that contains both nitrogen (N) and oxygen (O) atoms within its structure.
2. Step 2: Recall the common functional groups and their characteristic atoms: Alkynes and alkenes contain only carbon and hydrogen atoms with triple and double bonds respectively, so they do not contain nitrogen or oxygen.
3. Step 3: Consider ethers, which have an oxygen atom bonded to two carbon atoms (R-O-R'), but do not contain nitrogen atoms.
4. Step 4: Examine amides, which have a carbonyl group (C=O) directly bonded to a nitrogen atom (N), thus containing both nitrogen and oxygen atoms in their structure.
5. Step 5: Conclude that the functional group containing both nitrogen and oxygen atoms is the amide group.