electron affinity

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aaronharouni
Posts: 72
Joined: Fri Sep 28, 2018 12:15 am

electron affinity

Postby aaronharouni » Sun Nov 04, 2018 10:49 pm

Why does cl have a higher electron affinity than f?

Akhil Paladugu 3G
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: electron affinity

Postby Akhil Paladugu 3G » Mon Nov 05, 2018 12:34 am

Fluorine, though higher than chlorine in the periodic table, has a very small atomic size. This makes the fluoride anion so formed unstable (highly reactive) due to a very high charge/mass ratio. As a result, fluorine has an electron affinity less than that of chlorine.

lindsey_ammann_4E
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: electron affinity

Postby lindsey_ammann_4E » Thu Nov 08, 2018 9:45 am

Fluorine is kind of an exception to the general rule of electron affinity. Typically, you would expect F to have a higher electron affinity since it is higher in the group than Cl. F is very small though, so there is electron-electron repulsion when you add a new electron because there are already electrons tightly held by the nucleus. Therefore, the electron affinity is lower than Cl due to the lessened attraction felt by the incoming electron.

shouse1f
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: electron affinity

Postby shouse1f » Sun Nov 11, 2018 7:23 pm

are electron affinity and electronegativity related?

Kevin Tang 4L
Posts: 83
Joined: Fri Sep 28, 2018 12:28 am

Re: electron affinity

Postby Kevin Tang 4L » Sun Nov 11, 2018 8:33 pm

shouse1I wrote:are electron affinity and electronegativity related?


They are related in the sense that they follow the same periodic trend. The highest electronegative and highest electron affinity are on the top right side of the periodic table. However, the noble gases are an exception in electron affinity as they have a full shell.

Quynh Vo
Posts: 45
Joined: Sun Sep 29, 2019 12:15 am

Re: electron affinity

Postby Quynh Vo » Sun Oct 27, 2019 3:09 pm

Fluorine's atomic size is smaller than Chlorine.

Maeve Miller 1A
Posts: 51
Joined: Fri Aug 09, 2019 12:16 am

Re: electron affinity

Postby Maeve Miller 1A » Sun Oct 27, 2019 10:29 pm

shouse1f wrote:are electron affinity and electronegativity related?


Yes, because a higher electron negativity means a greater affinity for electrons. Moreover, both follow the same periodic trends.


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