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Question

Chemistry Question on Electronic Configurations Of Elements And The Periodic Table

Outermost electronic configurations of four elements A,B,C,D are given below:
(A) 3s2 (B) s23p1 (C) 3s23p3 (D) 3s23p4
The correct order of fist ionization enthalpy for them is:

A

(A)< (B)< (C) < (D)

B

(B)< (A)< (D)< (C)

C

(B) <(D)< (A)< (C)

D

(B)< (A)< (C) < (D)

Answer

(B)< (A)< (D)< (C)

Explanation

Solution

The correct answer is (B): (B)< (A)< (D)< (C)
Orbitals with fully filled and half-filled electronic configuration are stable, and require more energy for ionization
Elements with greater electronegativity require more energy for ionisation