Electron Affinity Exam 2

Electron Affinity

The amount of energy required to add an electron

EA Trend

As we go across a period it becomes more negative. The second element in each group is the most negative.

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.

The more positive an EA…

The harder it is to accept or add an electron