Electron Affinty

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VGonzalez
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Joined: Fri Sep 28, 2018 12:18 am

Electron Affinty

Postby VGonzalez » Thu Oct 25, 2018 4:48 pm

What exactly is electron affinity and what does it say about an element?

Chem_Mod
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Re: Electron Affinty

Postby Chem_Mod » Thu Oct 25, 2018 5:03 pm

Electron affinity refers to the amount of energy that is released when a neutral element gains an electron to become negatively charged. The higher the release in energy, the higher likelihood it gains electrons.

Andrea Zheng 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Electron Affinty

Postby Andrea Zheng 1H » Thu Oct 25, 2018 5:06 pm

Electron affinity is the energy released when an electron is added to a gas-phase atom. If the electron affinity is positive, then energy is released when the electron is added to the atom. This would occur if the electron has a lower energy when it occupies the atom's orbital. If the electron affinity is negative, then energy is needed to add the electron to the atom. This is the case with noble gas elements. It is unfavorable to add an electron to the noble gases, as the added electron would be in an orbital outside the filled shell and away from the nucleus and thus requires a large input of energy.


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