Periodic Trend: Electron Affinity Video Lessons

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Problem: Rank these elements according to electron affinity.Ne      Br       Al

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We are asked to rank these elements according to electron affinity.

Ne      Br       Al

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:




Note: Nobel gases are not included in the trend and will have the lowest electron affinity. 

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Problem Details

Rank these elements according to electron affinity.

Ne      Br       Al

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