The correct IUPAC suffix for a ketone is "-one."
Explanation:
1. A ketone is a functional group in organic chemistry consisting of a carbon double-bonded to an oxygen atom, which is then bonded to two other carbon groups.
2. When naming a ketone using IUPAC nomenclature, the parent chain is determined, and the suffix "-one" is added to the root of the alkane name corresponding to the longest continuous carbon chain containing the ketone group.
Example:
- In the case of a ketone like acetone (CH₃COCH₃), the parent chain is propane. By adding the "-one" suffix to propane, we get "propanone," which is the IUPAC name for acetone.
Therefore, the correct IUPAC suffix for a ketone is "-one."
