Question

which of the following could form an ionic compound? check all that apply.
o₂⁻ and s₂⁻
cl⁻ and k⁺
ca²⁺ and fe³⁺
na⁺ and f⁻

Explanation:

Step1: Recall ionic compound formation

Ionic compounds form between a cation (positive ion) and an anion (negative ion).

Step2: Analyze each pair

• \(O_2\) and \(S_2\): Both are neutral molecules (not ions), so no ionic compound.
• \(Cl^-\) and \(K^+\): \(Cl^-\) (anion) and \(K^+\) (cation) can form \(KCl\) (ionic compound).
• \(Ca^{2 +}\) and \(Fe^{3+}\): Both are cations, no ionic compound.
• \(Na^+\) and \(F^-\): \(Na^+\) (cation) and \(F^-\) (anion) can form \(NaF\) (ionic compound).

Answer:

\(Cl^-\) and \(K^+\), \(Na^+\) and \(F^-\)