Q.

Which among the following electronic configurations belong to main group elements                    [2025]

A.   [Ne]3s1

B.   [Ar]3d34s2

C.   [Kr]4d105s25p5

D.   [Ar]3d104s1

E.   [Rn]5f06d27s2

Choose the correct answer from the option given below:

1 D and E only  
2 A, C and D only  
3 B and E only  
4 A and C only  

Ans.

(4)

The p-block elements together with s-block elements are known as representative elements or main group elements.