Chemistry Practice Problems Periodic Trends: Electron Affinity Practice Problems Solution: Which element has the highest (most negative) elec...

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

Problem

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

a. Xe

b. S

c. Cs

d. Ba

e. Cu

Solution

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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Q. Which element has the highest first electron affinity?a. Ob. Mgc. Nad. Ne

Solved • Wed Mar 21 2018 13:02:11 GMT-0400 (EDT)

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Q. Rank these elements according to electron affinity. 

Solved • Thu Feb 22 2018 10:01:49 GMT-0500 (EST)