Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca ? — s Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: The valence electronic configuration of the Group 2 alkaline earth metals (Be, Mg, Ca) is ns^2. Step 2: Therefore, they all have a pair of s-electrons in their outermost shell (ns^2) and no p-electrons in their outermost shell (e.g., Be has 2s^2, Mg has 3s^2, Ca has 4s^2). Only the inner shells contain filled p-orbitals. Step 3: Thus, stating that all of them contain a pair of p-electrons in their outermost energy level is incorrect, making option (b) the correct choice.