Which of the following species has the highes | vedclass

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(B) Electron affinity is the energy released when an electron is added to a neutral gaseous atom.$F^{-}$ and $O^{-}$ are anions; adding an electron to

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$O$

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(B) Electron affinity is the energy released when an electron is added to a neutral gaseous atom.$F^{-}$ and $O^{-}$ are anions; adding an electron to them requires overcoming inter-electronic repulsion,making the process endothermic ($EA$ is negative or effectively zero).$Na^{+}$ is a cation with a stable noble gas configuration $(1s^2 2s^2 2p^6)$,so it has a very low tendency to accept another electron.$O$ (Oxygen) is a neutral atom with a high effective nuclear charge and an incomplete $2p$ subshell,allowing it to release energy upon gaining an electron to achieve a more stable configuration.Therefore,$O$ has the highest electron affinity among the given species.

Which of the following species has the highest electron affinity?

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