Magnesium cation has polarising power close to that of : — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Polarizing power depends on ionic charge density, which is proportional to the charge-to-size ratio (ionic charge / ionic radius). Step 2: Lithium (Li+) and Magnesium (Mg^2+) display a diagonal relationship in the periodic table. Step 3: Due to this relationship, they have very similar charge-to-size ratios, giving the Mg^2+ cation a polarizing power close to that of the Li+ ion (option a).