Classification Of Elements And Periodicity In Properties Ques 32

32. Which electronic configuration of an element has abnormally high difference between second and third ionization energy?

[1993]

(a) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{1}$

(b) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{1} 3 p^{1}$

(c) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2} 3 p^{2}$

(d) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}$

Show Answer

Answer:

Correct Answer: 32.(d)

Solution:

(d) Abnormally high difference between 2nd and 3rd ionization energy means that the element has two valence electrons.