Final answer:
NaNO₂, KClO₃, and Fr₂C₂O₄ are the ionic compounds among the options provided, composed of metal cations and non-metal anions held together by ionic bonds.
Step-by-step explanation:
Of the compounds listed, B) NaNO₂, F) KClO₃, and H) Fr₂C₂O₄ are ionic compounds. Ionic compounds are formed when metals combine with non-metals and are held together by ionic bonds, which involve the transfer of electrons from the metal to the non-metal. Here is a brief explanation for each:
- NaNO₂ (Sodium nitrite) - Ionic, with ions Na⁺ (sodium) and NO₂⁻ (nitrite).
- KClO₃ (Potassium chlorate) - Ionic, with ions K⁺ (potassium) and ClO₃⁻ (chlorate).
- Fr₂C₂O₄ (Francium oxalate) - Ionic, with ions Fr⁺ (francium) and C₂O₄²⁻ (oxalate).
The remaining compounds involve transition metals or non-metal elements, which can form covalent bonds or complex ions, making their classification less straightforward without additional context.