Which of the following order regarding second ionization energy of N, P and As is correct?

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$N > As > P$

$P > AS > N$

$P > N > As$

$N > P > As$

answer is B.

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Detailed Solution

The ionization energy is a measure of the capability of an element to enter into chemical reactions requiring ion formation or donation of electrons. It is also generally related to the nature of the chemical bonding in the compounds formed by the elements.

The effective nuclear charge of As is larger than P due to less shielding effect of 3d orbitals-making the second ionization energy of As greater than that of P.

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