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Q)

Beryllium and aluminium exhibit many properties which are similar.but the t

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

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A)

Similarity in properties between first element of a group and second element of the next group.

the two elements differ in

  •  

    exhibiting maximum covalency in compounds

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  Be and Al exhibit many similar properties but covalency of Be is 4 because it has an absence of d-orbital whereas, covalency of Al is up to 6 due to the presence of vacant d-orbital.
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