How do I identify excited state through the electronic configuration

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505166714
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Joined: Fri Sep 28, 2018 12:17 am

How do I identify excited state through the electronic configuration

Postby 505166714 » Mon Oct 22, 2018 8:31 pm

Does the down spin represent a higher energy? Is it okay if I put down arrows instead of arrows pointing up? How do I tell if the atom is in an excited state by looking at the electron configuration?
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Blake Salfer 1B
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Joined: Fri Sep 28, 2018 12:18 am

Re: How do I identify excited state through the electronic configuration

Postby Blake Salfer 1B » Mon Oct 22, 2018 8:38 pm

An atom is in an excited state if the electron configuration is incorrect. Like for A if there were two up arrows in two separate boxes in the 2p orbitals it would be in its ground state. For C it is excited because there is a electron in 2p instead of a second electron in the 2s. The only element in its ground state is oxygen in letter D because the electron configuration is filled out correctly. I do not think the spin has anything to do with higher energy.

Max Hayama 4K
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Joined: Fri Sep 28, 2018 12:16 am

Re: How do I identify excited state through the electronic configuration

Postby Max Hayama 4K » Mon Oct 22, 2018 8:38 pm

Arrow down does not necessarily represent an excited state, it only indicates that an electron has a spin opposite to arrow up. However, if the other electrons in the subshell have arrows upward and one is down, this signifies an excited state because the most stable/conventional spins for a half filled subshell is spins all in the same way(up or down). You can kind of tell if a electron is in the excited state, if it does not follow Pauli Exclusion Principle, Hund's Rule, or Aufbau.

annabel 2A
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Joined: Fri Sep 28, 2018 12:18 am

Re: How do I identify excited state through the electronic configuration

Postby annabel 2A » Wed Oct 24, 2018 12:38 am

Is there a specific way that the electron configuration will change when the electron is excited?

Sarah_Kang_2K
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Joined: Fri Sep 28, 2018 12:23 am

Re: How do I identify excited state through the electronic configuration

Postby Sarah_Kang_2K » Wed Oct 24, 2018 11:08 am

Would anyone be able to share their notes from monday lecture with me? I wasn't able to make it. If so, if you could email me at sarah27kang@gmail.com, it'd be greatly appreciated!

Sophia Ding 1B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: How do I identify excited state through the electronic configuration

Postby Sophia Ding 1B » Wed Oct 24, 2018 11:49 am

For the most part, I think you can tell an electron is in its excited state if the configuration deviates from what would be expected; in both (a) and (c) there are the abnormalities of filling Px and filling p before s respectively, thus representing an excited state. As for (b), I also want to emphasize your question as to whether spin down represents an excited state, as the answer stated that this was an excited state. I learned in high school to always do all orientations upwards in each subshell before putting the down arrows which is why this may be seen as excited, but I'm also curious as to why this downward orientation makes it so that the configuration is excited?


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