What is the second electron affinity of Se?
I believe the first is... Se- -> Se + e-
The second.... Se -> Se+ + e-
Nope, affinity forms more negative ions.
Se++ + e- >>Se+
To determine the second electron affinity of Se (selenium), we need to look at its electron configuration and analyze its periodic trends.
The first electron affinity of Se refers to the change that occurs when a neutral Se atom gains an electron to form the Se- ion:
Se + e- -> Se-
Now, to determine the second electron affinity, we need to consider the tendency of the Se- ion (Se-) to gain another electron, producing the Se2- ion. However, it is important to note that the second electron affinity of Se is generally not favorable or commonly observed.
Typically, after gaining one electron and forming the negative ion, the additional electron is repelled by the negatively charged ion, making it difficult to add a second electron. This trend is commonly observed in elements with relatively high first electron affinities, such as oxygen, sulfur, and selenium.
Therefore, based on the periodic trends and the general behavior of elements, we can conclude that the second electron affinity of Se is not commonly observed, as the addition of a second electron is unfavorable.