Electron Affinity???

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Shundeen Martinez 1D
Posts: 31
Joined: Fri Sep 28, 2018 12:18 am

Electron Affinity???

Postby Shundeen Martinez 1D » Tue Oct 30, 2018 11:19 pm

Why does Sulfur have a higher electron affinity than Oxygen if it is below Oxygen on the periodic table?

Kate_Santoso_4F
Posts: 72
Joined: Fri Sep 28, 2018 12:29 am

Re: Electron Affinity???

Postby Kate_Santoso_4F » Tue Oct 30, 2018 11:38 pm

Oxygen has a smaller atomic radius than sulfur so oxygen electrons experience more repulsions between each other since the valence shell is held closer to the nucleus. When an external electron is introduced, energy is released (electron affinity) but at the same time energy is consumed due to instability caused by the electron repulsions in oxygen. This is why sulfur has a higher electron affinity.

Kavya Juwadi 3C
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

Re: Electron Affinity???

Postby Kavya Juwadi 3C » Thu Nov 01, 2018 11:41 pm

This question is an exception to the general rule and the fact that sulfur has a higher electron affinity than oxygen was found through experimentation.

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Electron Affinity???

Postby michelle » Fri Nov 02, 2018 2:35 pm

Sulfur has a higher effective nuclear charge which can attract electrons more strongly.


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