Q. 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]5f$^0$6d$^2$7s$^2$ Choose the correct answer from the options given below:

A) B and E only
B) A and C only
C) D and E only
D) A, C and D only
Explanation

[Solution by Claude - not from source] A is Na and C is I (s- and p-block, main group). B is V, D is Cu and E is Rf (d-block). So A and C only. Answer (2).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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