Electron Affinity  [ENDORSED]

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Lubna_Abdulmajeed_2A
Posts: 21
Joined: Wed Sep 21, 2016 2:59 pm

Electron Affinity

Postby Lubna_Abdulmajeed_2A » Tue Oct 18, 2016 12:43 am

Hello,
can someone please elaborate on the concept of electron affinity. What does a negative value mean as oppose to a positive one? and why do oxygen and sulfur have both a negative & a positive value?

Thank you!

Jessie_Chen_2L
Posts: 20
Joined: Wed Sep 21, 2016 2:59 pm

Re: Electron Affinity  [ENDORSED]

Postby Jessie_Chen_2L » Tue Oct 18, 2016 12:46 am

Electron affinity is the amount of energy released when an electron is added to a gas-phase atom. A positive electron affinity means that energy is released when an electron is added. A negative electron affinity means that energy must be supplied for an atom to gain an electron.

Jata_Kavya_3A
Posts: 22
Joined: Wed Sep 21, 2016 2:57 pm

Re: Electron Affinity

Postby Jata_Kavya_3A » Tue Oct 18, 2016 9:59 am

you can also think of electron affinity as an atom's tendency or natural ability for wanting electrons. An atom with a stronger electron affinity is one that would be more likely to take an electron to complete a sub shell.

Nick Foucrier 3J
Posts: 20
Joined: Sat Jul 09, 2016 3:00 am

Re: Electron Affinity

Postby Nick Foucrier 3J » Tue Oct 18, 2016 3:21 pm

For the general trend on the periodic table:
Electron Affinity increases as you moved from left to right
Electron Affinity decreases as you move from top to bottom


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