Question

what are polyatomic ions?
what is the name for the cn⁻ ion?
carbonitrate
carbonitride
cyanide

Explanation:

The question asks for the name of the \(CN^-\) ion. By referring to common polyatomic ion names and their formulas, the \(CN^-\) ion is known as the cyanide ion. The other options "carbonitrate" and "carbonitride" are not standard names for this ion.

Answer:

C. cyanide