Recall that electron affinity is the energy change from the addition of 1 e– to a gaseous element/ion.
It is represented by this chemical equation:
Atom(g) + e– → Ion–(g), ΔE = –E.A.
Which one of the following equations correctly represents the process involved in the electron affinity of X?
A. X(g) → X+(g) + e-
B. X+(g) → X+(aq)
C. X+(g) + e- → X(g)
D. X(g) + e- → X-(g)
E. X+(g) + Y-(g) → XY(s)
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