The electron affinity values of elements A, B, C and D are respectively -135,-60,-200 and -348 kJ mol -1 The outer electronic configuration of element B is

Question

The electron affinity values of elements A, B, C and D are respectively -135,-60,-200 and -348 kJ mol -1 The outer electronic configuration of element B is (A) 3 s2 3 p5 (B) 3 s2 3 p4 (C) 3 s2 3 p3 (D) 3 s2 3 p2

Tardigrade Admin · Accepted Answer

Elements having half or completely-filled orbitals, ie, having stable electronic configuration have very low negative value of electron affinity. Since, the electron affinity of B is lowest among the given, it has stable electronic configuration, ie, 3 s2, 3 p3

Q. The electron affinity values of elements $A, B, C$ and $D$ are respectively $- 135, - 60, - 200$ and $- 348 k J m o l^{- 1}$ The outer electronic configuration of element $B$ is

$3 s^{2} 3 p^{5}$

$3 s^{2} 3 p^{4}$

$3 s^{2} 3 p^{3}$

$3 s^{2} 3 p^{2}$

Elements having half or completely-filled orbitals, ie, having stable electronic configuration have very low negative value of electron affinity. Since, the electron affinity of $B$ is lowest among the given, it has stable electronic configuration, ie, $3 s^{2}, 3 p^{3}$

Q. The electron affinity values of elements A,B,C and D are respectively −135,−60,−200 and −348kJmol−1 The outer electronic configuration of element B is

3s23p5

3s23p4

3s23p3

3s23p2