Electronegativity vs. Electron Affinity

Moderators: Chem_Mod, Chem_Admin

Labiba Sardar 2A
Posts: 81
Joined: Sat Jul 20, 2019 12:15 am

Electronegativity vs. Electron Affinity

Postby Labiba Sardar 2A » Sun Nov 03, 2019 3:03 pm

What's the difference between electronegativity and electron affinity? Also, why does electron affinity increase across and up the periodic table?

Jamie Lee 1H
Posts: 54
Joined: Fri Aug 09, 2019 12:15 am

Re: Electronegativity vs. Electron Affinity

Postby Jamie Lee 1H » Sun Nov 03, 2019 3:06 pm

Electronegativity is how well an atom can attract electrons to itself while electron affinity is the amount of energy release when an electron is added. Electron affinity increases from left to right because the electrons that are added to the energy levels becomes closer to the nucleus which creates a stronger attraction.

Noah Canio 3C
Posts: 55
Joined: Wed Sep 18, 2019 12:20 am

Re: Electronegativity vs. Electron Affinity

Postby Noah Canio 3C » Sun Nov 03, 2019 3:14 pm

Electronegativity refers to how well an atom can attract an electron to itself when that atom is within a molecule while electron affinity, as mentioned above, refers to how much energy is released when an atom takes in an electron (the more simple and easier to understand definition would be the atom's attraction for electrons. This contrasts from electronegativity since electronegativity is a property of an atom when it's already paired to create a molecule or compound while electron affinity is a property of an atom by itself). Electron affinity increases because as you go up and right on the periodic table, the atomic radius decreases. As the atomic radius decreases, the effective nuclear charge of the atom becomes stronger, holding on to electrons more tightly.

Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

Re: Electronegativity vs. Electron Affinity

Postby Megan_1F » Sun Nov 03, 2019 7:28 pm

Does electron affinity have any correlation with potential energy in an atom when it receives electrons - releases energy?

Return to “Trends in The Periodic Table”

Who is online

Users browsing this forum: No registered users and 1 guest