when ionic compounds are named, the name of a monatomic anion will end in which of the following suffixes?
When ionic compounds are named, the name of a monatomic anion ends in the suffix ‑ide.
How the suffix works
- Start with the stem of the element name (for example, “chlor‑” for chlorine).
- Add the suffix ‑ide , then (when referring to the ion itself) append the word ion (e.g., “chloride ion”).
Common examples
- Cl⁻ → chloride
- O²⁻ → oxide
- S²⁻ → sulfide
- N³⁻ → nitride
So the correct suffix for a monatomic anion in an ionic‑compound name is ‑ide.