Problem: What are the observed periodic trends in electron affinity?

FREE Expert Solution

We are asked to show the observed trends in electron affinity.

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. 



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What are the observed periodic trends in electron affinity?