Chemistry Practice Problems Periodic Trends: Electron Affinity Practice Problems Solution: Choose the element with the more negative (more ex...

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Solution: Choose the element with the more negative (more exothermic) electron affinity from each pair:a. Mg or Sb. K or Csc. Si or Pd. Ga or Br

Problem

Choose the element with the more negative (more exothermic) electron affinity from each pair:
a. Mg or S
b. K or Cs
c. Si or P
d. Ga or Br

Solution

We’re being asked to choose the element with the more negative (more exothermic) electron affinity from each pair


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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Additional Practice Problems

Periodic Trends: Electron Affinity

Periodic Trends: Electron Affinity

Q. For which element is the gaining of an electron most exothermic?a) Lib) Nc) Fd) B

Solved • Mon Nov 12 2018 12:40:37 GMT-0500 (EST)