question_answer

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in

A) exhibiting maximum covalency in compounds

B) forming polymeric hydrides

C) forming covaient halides

D) exhibiting amphoteric nature in their oxides

Correct Answer: A

Solution :

Since, be andhave diagonal relationship and so possess similar properties but Be can not form polymeric hydrides. Alternate Solution Berylliumshow maximum covalency of 4 but aluminiumshow maximum covalency of 6. Therefore, aluminium form polymeric hydrides but the beryllium do not form.