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Element with their electronic configurations are given
\( \mathrm{P} \)
below:
W
Answer the following questions:
I. \( \quad 1 s^{2} 2 s^{2} \)
II. \( 1 s^{2} 2 s^{2} 2 p^{6} \)
III. \( 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} \)
IV. \( 1 s^{2} 2 s^{2} 2 p^{3} \)
V. \( 1 s^{2} 2 s^{2} 2 p^{5} \)

The element with lowest electron gain enthalpy is:
(1) I
(2) II
(3) III
(4) IV


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