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The increasing order of electron affinity of the
\( \mathrm{P} \)
electronic configuration of elements is:
W
(I) \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{5} \)
(II) \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{3} \)
(III) \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{5} \)
(IV) \( 1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{1} \)
(1) II \( \) IV \( \) III \( \) I
(2) I \( \) II \( \) III \( \) IV
(3) I \( \) III \( \) II \( \) IV
(4) IV \( \) III \( \) II \( \) I
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