MHTCET 15 May 2024 Shift 2 Paper

Concept:Beryllium shows a diagonal relationship with aluminium, not with any of the other given elements.Explanation:In the periodic table, a diagonal relationship is observed between an element in period 2 and the element in period 3 one group to its right.Beryllium (Be) is in group 2 and period 2.Moving diagonally down-right, the matching element is aluminium (Al), which is in group 13 and period 3.This similarity arises because both Be and Al have comparable charge-to-radius ratios and similar polarising power.Their electronic configurations are:Beryllium: $1s^{2}2s^{2}$Aluminium: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$Both form covalent compounds and show amphoteric behaviour, meaning they react with both acids and bases.For example, both form complexes such as $\mathrm{BeF}_2$ and $\mathrm{AlCl}_3$.Therefore, among the given options, the element showing a diagonal relationship with Be is aluminium.Answer:Option C: Al