Beryllium shows resemblance with its diagonally opposite element aluminium. Points of similarity are: (1) Both metals have a tendency to form covalent compounds e.g. the chlorides of both being covalent are soluble in organic solvents. (2) Both BeCl2 and AlCl3 act as a Lewis acids and are used as Friedel - Crafts catalyst. (3) These two elements have same … [Read more...] about Diagonal Relationship of Beryllium and Aluminium