Question

which of the following pairs of elements could react to form an ionic compound? check all that apply.
cl and br
ba and cu
s and k
ca and cl

Explanation:

Ionic compounds are formed between metals and non - metals. Calcium (Ca) is a metal and chlorine (Cl) is a non - metal. Sulfur (S) is a non - metal and potassium (K) is a metal. Chlorine (Cl) and bromine (Br) are both non - metals, so they would form a covalent compound. Barium (Ba) and copper (Cu) are both metals, so they do not form an ionic compound.

Answer:

S and K, Ca and Cl