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Q.

The configuration of the element which shows a sudden jump in its third ionization potential is

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a

1s22s22p63s23p1

b

1s22s22p63s2

c

1s22s22p63s1

d

1s22s22p63s23p4

answer is B.

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Detailed Solution

Sudden jump in  3rd IP(IP3) indicates that the element attains octet configuration after the loss of two electrons. Number of valence electrons in the element must be two. It must be a second group element, Ne3s2.
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