The radius of which ion is closest to that of Li+ ion? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Step 1: Lithium (Li) and Magnesium (Mg) have a diagonal relationship in the periodic table due to their similar ionic potential (charge-to-size ratio). Step 2: This diagonal relationship results in remarkably similar ionic radii for their ions: Li^+ is approximately 76 pm, and Mg^2+ is approximately 72 pm. Step 3: Thus, the ionic radius of Mg^2+ is the closest to that of Li^+.