Question

which of these ionic compounds have polyatomic ions? check all that apply. caco₃ naf feo cacl₂ naoh

Explanation:

• For \(CaCO_3\): It dissociates into \(Ca^{2 + }\) and \(CO_3^{2 - }\). The carbonate ion \(CO_3^{2 - }\) is a polyatomic ion (composed of multiple atoms).
• For \(NaF\): It dissociates into \(Na^{+}\) and \(F^{-}\). Both are monatomic ions.
• For \(FeO\): It dissociates into \(Fe^{2+}\) and \(O^{2 - }\). Both are monatomic ions.
• For \(CaCl_2\): It dissociates into \(Ca^{2+}\) and \(Cl^{-}\). Both are monatomic ions.
• For \(NaOH\): It dissociates into \(Na^{+}\) and \(OH^{-}\). The hydroxide ion \(OH^{-}\) is a polyatomic ion.

Answer:

A. \(CaCO_3\), E. \(NaOH\)