which of these pairs would form an ionic bond?\no k and br\no c and h\no h and o\no cu and cu

Answer

Brief Explanations:

Ionic bonds form between a metal and a non - metal. Potassium (K) is a metal and bromine (Br) is a non - metal. Carbon (C) and hydrogen (H), hydrogen (H) and oxygen (O) form covalent bonds as they are non - metals. Copper (Cu) and copper (Cu) do not form an ionic bond as it's the same metal.

Answer:

K and Br