Electron Affinity

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Megan Potter 1G
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Joined: Fri Apr 06, 2018 11:04 am

Electron Affinity

Postby Megan Potter 1G » Thu May 03, 2018 10:23 pm

what is electron affinity? like for the question: Which has a higher electron affinity - Chlorine (Cl) or Neon (Ne)?

Patience Olsen 1A
Posts: 28
Joined: Fri Apr 06, 2018 11:04 am

Re: Electron Affinity

Postby Patience Olsen 1A » Thu May 03, 2018 10:29 pm

Electron affinity is the amount of energy released when an electron is added to a neutral atom. It can also be understood as the likelihood of an atom to accept an electron, so the halogens have the greatest electron affinity of all elements. Noble gases, being in a stable state, have the lowest electron affinity of all elements. By definition, chlorine has a higher electron affinity than neon.

joannehaddad
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Electron Affinity

Postby joannehaddad » Sat May 12, 2018 10:14 pm

The trend for electron affinity is that it increases across a period and decreases down a group, so when answering questions phrased like that, you could just use the trend! Also, electron affinity is how many energy is spent or released when a neutral atom gets an electron added to it.

Tarek Abushamma
Posts: 30
Joined: Fri Apr 06, 2018 11:01 am

Re: Electron Affinity

Postby Tarek Abushamma » Sun May 13, 2018 12:37 pm

These trends have many of exceptions, however, so it is also important to take the element's electron configuration into consideration when determining how it would respond to additional electrons.

Olivia Young 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron Affinity

Postby Olivia Young 1A » Sun Oct 07, 2018 7:14 pm

Electron affinity is the energy that is released when an electron is added to a gas-phase atom. Generally, the trend for electron affinity is that it increases left to right across a period until it reaches the noble gases and decreases going down a group. Of course there are exceptions to this trend, like the elements sulfur and oxygen. To answer your question, Chlorine has a higher electron affinity than Neon because Neon is a noble gas and it would therefore require energy to add an electron, versus the high amount of energy that would be released from adding an electron to Chlorine to achieve the most stable state under the octet rule.


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