Electron Affinity  [ENDORSED]

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Samantha Chung 4I
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Joined: Wed Oct 03, 2018 12:16 am

Electron Affinity

Postby Samantha Chung 4I » Fri Oct 26, 2018 10:10 am

I think during lecture on Wednesday Professor Lavelle mentioned about the electron affinity, what is the trend of the electron affinity down the group and across the period in the Periodic Table?

Aaron Ang 4H
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Electron Affinity  [ENDORSED]

Postby Aaron Ang 4H » Fri Oct 26, 2018 11:07 am

Electron affinity decreases down a group and increases across a period

Raymond Ko 1H
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Joined: Fri Sep 28, 2018 12:19 am

Re: Electron Affinity

Postby Raymond Ko 1H » Fri Oct 26, 2018 11:13 am

To summarize, electron affinity is the energy released when electrons are added to an atom in the gas phase. Elements in the top right of the period table, up till group 17, generally have high electron affinities. Adding electrons to filled valence shells is unfavorable because further energy is required.

Yukta Italia 3I
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Re: Electron Affinity

Postby Yukta Italia 3I » Sat Oct 27, 2018 2:50 pm

So are elements with high electron affinity most likely to form anions?

Alexandra Albers 1D
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Joined: Fri Sep 28, 2018 12:18 am

Re: Electron Affinity

Postby Alexandra Albers 1D » Sat Oct 27, 2018 2:56 pm

I believe that elements with higher electron affinities like to gain electrons to have a stable octet similar to a noble gas.

Michael Torres 4I
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Re: Electron Affinity

Postby Michael Torres 4I » Sat Oct 27, 2018 3:03 pm

Yukta Italia 3I wrote:So are elements with high electron affinity most likely to form anions?


Elements with a high electron affinity are more likely to form anions than elements with a lower electron affinity.

Quinn_Simpson_3D
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Joined: Fri Sep 28, 2018 12:26 am

Re: Electron Affinity

Postby Quinn_Simpson_3D » Sun Oct 28, 2018 2:31 pm

Electron affinity does not have as much as a defined trend as ionization energy and atomic radius. However, the gases in the top right corner of the periodic table have a high electron affinity because they want to gain electrons to create a stable, filled shell, like a noble gas configuration. Metals and other elements have low electron affinity because they tend to lose electrons.

Estelle Jung
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Joined: Fri Sep 28, 2018 12:29 am

Re: Electron Affinity

Postby Estelle Jung » Sun Oct 28, 2018 8:08 pm

What exactly is electron affinity? Is it the tendency for an atom to gain an electron, thus forming an negative ion (anion)? So the trend on the periodic table is essentially saying that electron affinity, or the tendency to form an anion, increases when you go from left to right and from bottom to top?


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