Which of the following process involves the gain of
\( \mathrm{P} \...
Which of the following process involves the gain of
\( \mathrm{P} \) energy?
W
(1) \( \mathrm{O}(\mathrm{g})+\mathrm{e}^{-} \rightarrow \mathrm{O}^{-}(\mathrm{g}) \)
(2) \( \mathrm{Na}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Na} \)
(3) \( \mathrm{O}^{-}(\mathrm{g})+\mathrm{e}^{-} \rightarrow \mathrm{O}^{2-}(\mathrm{g}) \)
(4) \( \mathrm{O}^{2-}(\mathrm{g}) \rightarrow \mathrm{O}^{-}(\mathrm{g})+\mathrm{e}^{-} \)
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