The diagonal relationship observed between Lithium (Li) and Magnesium (Mg) is primarily attributed t — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

The elements of the 2nd period show diagonal relationships with the elements of the 3rd period (e.g., $Li$ and $Mg$, $Be$ and $Al$). This resemblance is due to their similar polarizing power or ionic potential, which is the ratio of their ionic charge to their ionic radius.