Electron Affinity and Eletronegativity

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Diane Kang 2F
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Joined: Fri Sep 28, 2018 12:18 am

Electron Affinity and Eletronegativity

Postby Diane Kang 2F » Thu Nov 01, 2018 12:10 am

From what I understand about electron affinity and electronegativity, the two seem to be pretty similar conceptually and in terms of periodic trends--they both increase across the period and decrease down a group.

What exactly is the difference between electron affinity and electronegativity?

Andonios Karas 4H
Posts: 30
Joined: Fri Sep 28, 2018 12:27 am

Re: Electron Affinity and Eletronegativity

Postby Andonios Karas 4H » Thu Nov 01, 2018 12:16 am

You are correct in saying that they do follow the same trends.
Electron Affinity is the measurable amount of energy released or needed to add an electron to an atom
Electronegativity is a construct made to help describe the reactivity of an atom which is based upon its willingness to pull electrons toward itself (determined by electron affinity and ionization energies).
Low ionization energies and low electron affinity mean low electronegativity. High ionization energies and high electron affinity means high electronegativity.

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