Give some of the Diagonal Relationships between Beryllium and Aluminium

Answer:

In the second and third periods of the periodic table, a Diagonal Relationship is believed to occur between certain pairings of diagonally adjacent elements.  e.g. (Li & Mg, Be & Al, B & Si etc.)

Some diagonal relationship between Aluminium and Beryllium are:

• Both beryllium and aluminium have a tendency to create covalent compounds, which is one of the diagonal relationships between them.
• Friedel crafts catalysts are beryllium chloride and aluminium chloride. Because they are both Lewis acids.
• In the presence of bases, both Be and Al dissolve, forming complexes such as beryllates and aluminates.
• Both oxides are high melting, insoluble solids that are extremely hard.
• Both metals’ hydroxides and oxides are amphoteric in nature.
• When beryllium and aluminium carbides come into contact with water, methane gas is released.