Question

Mention two reasons for the fact that the top element in each group
p-block exhibits unique behaviour
!
​

Answer 1

Answer:

The anomalous behaviour of first element of s and p block elements of each group as compared to other group members is due to following reasons: Small size of atom, large charge/radius ratio, high electronegativity and non availability of d-orbitals in their valence shell.

Answer 2

Answer:

(a)

# very small size atom

#do not have d orbitals

# large charge/ radius ratio

#high electronegativity and non availability of d-orbitals in valence shell

Explanation: