electron affinities

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Ruohan Sun 3I
Posts: 19
Joined: Fri Sep 29, 2017 7:07 am

electron affinities

Postby Ruohan Sun 3I » Sun Nov 05, 2017 6:12 pm

what are the electron affinities of group IIA elements and noble gases?

SPandya1F
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am
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Re: electron affinities

Postby SPandya1F » Sun Nov 05, 2017 6:19 pm

Electron Affinities of:
Group IIA- around zero because filled s subshell discourages addition of an electron
Noble Gases- completely filled shell discourages addition of an electron; electron affinity values are positive, meaning it requires input of energy to add an electron

Annalise Eder 2L
Posts: 49
Joined: Sat Jul 22, 2017 3:01 am

Re: electron affinities

Postby Annalise Eder 2L » Sun Nov 05, 2017 6:24 pm

The electron affinities are close to zero. Noble gases have complete octets and do not want any more electrons. The Alkaline metals also have very low electron affinity as they often form cations and prefer to give up electrons than gain them.


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