Problem: Which element has the highest (most negative) electron affinity?a. Xeb. Sc. Csd. Bae. Cu

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We’re being asked to determine the element with the highest (most negative) 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. 


The trend for electron affinity is as follows: it increases from left to right and decreases down a period in the periodic table. The given elements are:


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Problem Details

Which element has the highest (most negative) electron affinity?

a. Xe

b. S

c. Cs

d. Ba

e. Cu

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Electron Affinity concept. You can view video lessons to learn Periodic Trend: Electron Affinity. Or if you need more Periodic Trend: Electron Affinity practice, you can also practice Periodic Trend: Electron Affinity practice problems.

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Based on our data, we think this problem is relevant for Professor Brynteson's class at LU.