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Which among the following electronic configurations belong to main group elements?
A. $[\text{Ne}]3s^1$
B. $[\text{Ar}]3d^3 4s^2$
C. $[\text{Kr}]4d^{10}5s^2 5p^5$
D. $[\text{Ar}]3d^{10}4s^1$
E. $[\text{Rn}]5f^0 6d^2 7s^2$
Choose the correct answer from the options given below:
A. $[\text{Ne}]3s^1$
B. $[\text{Ar}]3d^3 4s^2$
C. $[\text{Kr}]4d^{10}5s^2 5p^5$
D. $[\text{Ar}]3d^{10}4s^1$
E. $[\text{Rn}]5f^0 6d^2 7s^2$
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
Main group elements belong to s- and p-blocks. A ($\text{Na}$, s-block) and C ($\text{I}$, p-block) are main group elements.
Detailed Solution
Main group (representative) elements are elements of the s-block and p-block (Groups 1, 2, and 13 to 18). Configuration A ($[\text{Ne}]3s^1$) is Sodium (Group 1, s-block). Configuration C ($[\text{Kr}]4d^{10}5s^2 5p^5$) is Iodine (Group 17, p-block). Configurations B (Vanadium) and D (Copper) are transition d-block elements, while E (Thorium) is an actinoid (f-block). Thus, only A and C belong to main group elements.