Electron Affinity  [ENDORSED]

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Electron Affinity

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

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!

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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.

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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
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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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