A) \[{{X}_{2}}(g)\xrightarrow{+2{{e}^{-}}}2{{X}^{-}}(g)\]
B) \[X(g)\xrightarrow{+{{e}^{-}}}{{X}^{-}}(g)\]
C) \[{{X}^{+}}(g)\xrightarrow{+{{e}^{-}}}X(g)\]
D) \[{{X}^{-}}(g)\xrightarrow{+{{e}^{-}}}{{X}^{2-}}(g)\]
Correct Answer: B
Solution :
Electron affinity is the energy released when an electron is added into a neutral isolated atom in its ground state. \[X(g)+{{e}^{-}}\xrightarrow{{}}{{X}^{-}}(g)+\text{ }energy\]
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