Question

which of the following pairs of elements could not react to form an ionic compound? check all that apply. ag and o k and f c and o co and br

Explanation:

Ionic compounds are formed between metals and non - metals.

• Ag (Silver) and O (Oxygen): Silver is a metal and oxygen is a non - metal. They can form an ionic compound (e.g., \(Ag_2O\)).
• K (Potassium) and F (Fluorine): Potassium is a metal and fluorine is a non - metal. They can form an ionic compound (\(KF\)).
• C (Carbon) and O (Oxygen): Both carbon and oxygen are non - metals. Non - metals typically form covalent compounds (e.g., \(CO\) or \(CO_2\)) through the sharing of electrons, not ionic compounds.
• Co (Cobalt) and Br (Bromine): Cobalt is a metal and bromine is a non - metal. They can form an ionic compound (e.g., \(CoBr_2\)).

Answer:

C and O