Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in
exhibiting maximum covalency in compounds
forming polymeric hydrides
forming covalent halides
exhibiting amphoteric nature in their oxides.
As we learnt in
Diagonal relationship -
Similarity in properties between first element of a group and second element of the next group
This is due to similarity in sizes of their ions, and charge / radius ratio
Anomalous behavious beryllium -
1) Due to small atomic and ionic size
2) High ionisation energy
3) No vacant d-orbitals
4) High hydration energy
Due to diagonal relationship and exhibit many similar properties but covalency of is 4 because it has an absence of d-orbital whereas, covalency of is up to 6 due to the presence of vacant d-orbital.
This option is correct.
This option is incorrect.
Create Your Account