GOB Chemistry

Learn the toughest concepts covered in your GOB - General, Organic, and Biological Chemistry class with step-by-step video tutorials and practice problems.

Ionic Compounds

Periodic Trend: Electron Affinity (Simplified)

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Electron Affinity is the energy released from the addition of an electron to a gaseous atom or ion.

Electron Affinity

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Periodic Trend: Electron Affinity (Simplified) Concept 1

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Periodic Trend: Electron Affinity (Simplified) Concept 2

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Generally, electron affinity increases moving from left to right across a period and going up a group.

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Periodic Trend: Electron Affinity (Simplified) Example 1

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Problem

Determine which atom in the following set has the largest electron affinity:N, O, C, B, Ne

a) N                              b) O                             c) C                              d) B                              e) Ne

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Problem

Rank the following elements in order of increasing electron affinity:Cs, Hg, F, S

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Problem

Which one of the following atoms has the least tendency to gain another electron?

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Problem

Arrange the following elements from greatest to least tendency to accept an electron:F, Li, C, O, Be