Explanation:
An ionic compound is composed f a metal and a non metal.
First Question:
Chlorine - Non metal
The metal would be H. Aluminium.
It is not Berylium because the electronegativity difference between it and chlorine is less than that of an ionic bond.
Second Question:
Phosphorus - Metal
The only non metal in the options is W. Oxygen
Third Question:
Magnesium - Metal
The only non metal in the options is I. Nitrogen
Fourth Question:
Sodium - Metal
The only non metal in the options is C. Sulfur
