Classification of Elements and Periodicity in Properties - Result Question 38
####38. Which electronic configuration of an element has abnormally high difference between second and third ionization energy?
(a) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{1}$
[1993]
(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) $1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}$
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Solution:
- (d) Abnormally high difference between 2nd and 3rd ionization energy means that the element has two valence electrons.
