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) 1s2,2s2,2p6,3s1

[1993]

(b) 1s2,2s2,2p6,3s13p1

(c) 1s2,2s2,2p6,3s23p2

(d) 1s2,2s2,2p6,3s2

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Solution:

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


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