Question

Which among the following electronic configurations belong to main group elements?

A. \([Ne]3s^1\)

B. \([Ar]3d^3 4s^2\)

C. \([Kr]4d^{10}5s^2 5p^5\)

D. \([Ar]3d^{10}4s^1\)

E. \([Rn]5t^0 6d^2 7s^2\)

Choose the correct answer from the option given below : 

(1) B and E only 

(2) A and C only 

(3) D and E only 

(4) A, C and D only

Answer 1

Correct option is: (2) A and C only 

(A) \([Ne]3s^1 ; \quad Na(s-block)\)

(B) \([Ar]3d^3 4s^2; \quad V(d-block)\)

(C) \([Kr]4d^{10} 5s^2 5p^{5.}; \quad I (p-block)\)

(D) \([Ar]3d^{10}4s^1; \quad Cu(d - block)\)

(E) \([Rn]5f^06d^27s^2; \quad Th(f- block)\)

Main group elements (A and C only)