Electron Affinity Exam 2
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4 Terms
1
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Electron Affinity
The amount of energy required to add an electron
2
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EA Trend
As we go across a period it becomes more negative. The second element in each group is the most negative.
3
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Exceptions to the EA Trend
Group 18 they have a full p orbital so it is harder to add an electron to the higher level
Group 2 they have a full s orbital so it is harder to add an electron to the next orbital
Group 15 they have a half filled orbital so it is harder to add another electron due to electron electron repulsion.
Group 2 they have a full s orbital so it is harder to add an electron to the next orbital
Group 15 they have a half filled orbital so it is harder to add another electron due to electron electron repulsion.
4
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The more positive an EA…
The harder it is to accept or add an electron
Note 
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