What is the difference between electron affinity and electronegativity?

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Nhi Vo 3A
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am

What is the difference between electron affinity and electronegativity?

Postby Nhi Vo 3A » Fri Oct 21, 2016 11:36 am

What is the difference between electron affinity and electronegativity?

They seem similar to me.

Justin Folk 3I
Posts: 43
Joined: Wed Sep 21, 2016 2:56 pm

Re: What is the difference between electron affinity and electronegativity?

Postby Justin Folk 3I » Fri Oct 21, 2016 11:47 am

They are inversely related-- electron affinity is the energy required to eject an electron, while electronegativity is the tendency to gain an electron

Pauline Tze 3B
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Re: What is the difference between electron affinity and electronegativity?

Postby Pauline Tze 3B » Fri Oct 21, 2016 3:56 pm

Nhi Vo 4G wrote:What is the difference between electron affinity and electronegativity?

They seem similar to me.

If you would review the notes under "electron configuration and periodicity of atomic properties" and "ionic vs. covalent bonds" and read sections 2.11 Electron Affinity and 3.12 Correcting the Covalent Model: Electronegativity, you would see that you're looking at the same phenomenon from two different perspectives:

Electron affinity is the energy released when an electron is added to a neutral gas-phase atom.
if this is positive, energy is released when electron is added to atom.
if this is negative, energy must be supplied to push an electron onto an atom.

Electronegativity is the tendency of an atom to pull electrons (specifically when it is part of a molecule.)
When this is high, electrons tend to be pulled by the atom.
when this is low, electrons tend to be pushed away from the atom.

Put simply, electron affinity and electronegativity are directly related. If electron affinity is positive (and/or high), electronegativity is high, and vice versa.

Hope that helps~

Nhi Vo 3A
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am

Re: What is the difference between electron affinity and electronegativity?

Postby Nhi Vo 3A » Tue Oct 25, 2016 7:06 pm

That really helps, thank you!


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