Ground vs Excited State

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Aidan Ryan 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am

Ground vs Excited State

Postby Aidan Ryan 1B » Wed Oct 24, 2018 4:12 pm

If two electrons are in the same orbital when other orbitals are still empty in that sub shell, (such as 2p containing two e- but they are both in the same orbital) is this considered ground state or excited state. This is from part A of question 1E 7 of 7th edition.

Francis_Nguyen3D
Posts: 35
Joined: Fri Sep 28, 2018 12:24 am

Re: Ground vs Excited State

Postby Francis_Nguyen3D » Wed Oct 24, 2018 4:26 pm

Hello,
this would be considered as an excited state because it does not follow Hund's Rule. The second electron should have filled in the next orbital rather than pairing up in the first one, if it followed this rule.

inlovewithchemistry
Posts: 104
Joined: Fri Sep 28, 2018 12:19 am

Re: Ground vs Excited State

Postby inlovewithchemistry » Wed Oct 24, 2018 11:04 pm

Hund's Rule is important to remember in answering this: every orbital must be filled in order for any of them to be doubly occupied. If you ever see two electrons in one orbital, two in the second and none in the third, or a diagram where one arrow is pointing up, one down, and then one up (in case of p-shell), you can know that these are in the excited state.

Alicia Gibbons 1B
Posts: 31
Joined: Fri Sep 28, 2018 12:17 am

Re: Ground vs Excited State

Postby Alicia Gibbons 1B » Thu Oct 25, 2018 11:04 am

In addition, ground state is the "neutral" state of the atom. An example of an excited state is when an electron absorbs a quantum of energy and is artificially raised to a different orbital (as we've been talking about in class).


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