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Which correctly summarizes the trend in electron affinity? it tends to be very high for group 2 it tends to be more negative across a period it tends to remain the same across periods it tends to be more negative down a group

Chelsea Hayes

in Chemistry

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Rodney Fox on January 15, 2018

The answer is that it tends to be more negative down a group. This is because as you go down the periodic table, the elements have more layers of electrons in their atoms. This makes the outer part of shells less attracted to the nucleus, due to its greater distance from the nucleus. Therefore, these deposits are less likely to attract electrons (therefore, the lower electron affinity) and are even more likely to lose electrons from their outer electron orbits.


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