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

Options

A. forming polymeric hydrides
B. exhibiting maximum covalency in compounds
C. forming covalent halides
D. exhibiting amphoteric nature in their oxides

Answer

B

Explanation

Due to the absence of vacant d-orbitals, the maximum covalency of Be is four e.g., `[BF_(4)]^(-)`. On the other hand, Al shows maximum covalency of six, e.g., `[AlF_(6)]^(3-)`, on account of the presence of vacant d-orbitals in the valence shell.