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Q.

The value of IE1,IE2,IE3 and IE4 of an atom are respectively 7.5 eV 25.6 eV 48.6 eV and 170.6 eV. The electronic configuration of the atom will be

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a

1s22s22p63s1

b

1s22s22p63s23p1

c

1s22s22p63s23p3

d

1s22s22p63s2

answer is B.

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Detailed Solution

There is a high jump from IE3 to IE4. Therefore, it is difficult to remove the 4th valence electron. So, electronic configuration of element must have three valence electrons. Hence, the answer is (2).
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The value of IE1,IE2,IE3 and IE4 of an atom are respectively 7.5 eV 25.6 eV 48.6 eV and 170.6 eV. The electronic configuration of the atom will be