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posted by  Kev9922 on 10/29/2008 5:34:42 PM  |  status: Closed  

Which is an Excited State?

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General Chemistry N/A N/A N/A
Question Details:

Which of the following electron configurations represents an excited state?

[Ne]3s23p1

[Ar]3d104s14p2

[Kr]4d105s15p1

[Ne]3s23p64s1

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posted by AsianCleo on 10/29/2008 8:49:38 PM  |  status: Live
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Response Details:
The second one
[Ar]3d104s14p2
 
This is because the s shelf when complete has 2 electrons but one of thoses electrons abosorbed energy, jumping to the p shelf.
Hope this helps ^.^ Please don't forget to rate!!!
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posted by Kev9922 on 10/29/2008 9:42:57 PM  |  status: Live
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There is either another configuration that represents an excited state or the 2nd one is not one.  Any Help??
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posted by Arcanum on 10/29/2008 9:50:09 PM  |  status: Live
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I believe it will be [Kr]4d105s15p1 is in the excited state just because the s is shaing an electron with the p, and should come back down.
 
I'd admit the 2nd one looks like it too, but in general chem that doesn't look like a classic model like the 3rd one is. And I think what he said was correct, or looks like that in my book as well. Hope that helps a bit. :+)
Pffhh, if I knew everything, I would spend my entire time on here answering questions, but until then ill spend my entire time on here asking questions... :+)
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