WAEC Chemistry 2023 Paper

Concept:Elements with lower ionization energy lose electrons more easily, so they react more readily with chlorine to form chlorides.Explanation:Chlorine accepts electrons, so the element with the lowest ionization energy reacts most easily.The given ionization energies are $12.0$, $21.0$, $106.0$ and $200.0\:\mathrm{kJ\:mol^{-1}}\times 10^{-3}$ for W, X, Y and Z respectively.Since W and X have the lowest ionization energies, they can lose electrons more readily than Y and Z.Therefore, W and X would react more readily with chlorine.Answer:C. W and X only