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NEET 2025

Exam: NEET
Year: 2025
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

NEET 2025 · Chemistry · Classification of Elements and Periodicity in Properties

Which among the following electronic configurations belong to main...

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

[\mathrm{Ne}] 3 \mathrm{~s}^1

B.

[\operatorname{Ar}] 3 \mathrm{~d}^3 4 \mathrm{~s}^2

C.

[\mathrm{Kr}] 4 d^{10} 5 s^2 5 p^5

D.

[\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^1

E.

[R n] 5 f^0 6 d^2 7 s^2

Choose the correct answer from the option given below:

Options

A $B \text{ and } E$ $\text{ only }$
B $\text{ A and C only }$
C $\text{ D and E only }$
D $\text{ A, C and D only }$

Correct answer

B. $\text{ A and C only }$

Step-by-step solution

Main group elements are s & p-block elements. A

\rightarrow

s-block

\mathrm{C} \rightarrow \mathrm{p}

-block

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