Filling electron shells  [ENDORSED]


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Lourick Bustamante 1B
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Joined: Wed Nov 16, 2016 3:02 am

Filling electron shells

Postby Lourick Bustamante 1B » Thu Oct 26, 2017 6:16 pm

Why do certain orbitals get filled first even though the other orbitals have a smaller number? (for example, 4s fills before 3d)

Chem_Mod
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Re: Filling electron shells  [ENDORSED]

Postby Chem_Mod » Thu Oct 26, 2017 9:20 pm

As I discussed in class: for K and Ca the 4s is lower in energy than the 3d

AnuPanneerselvam1H
Posts: 52
Joined: Fri Sep 29, 2017 7:07 am

Re: Filling electron shells

Postby AnuPanneerselvam1H » Sat Oct 28, 2017 5:41 pm

The 4s orbital is filed first because it is lower in energy compared to the 3d orbital. The lowest energy state is always preferred. Another example of this is with the Chromium and copper examples. The electron in the 4s orbital will move to the 3d orbital in order to the evenly fill the orbitals, which contributes to a lower and more stable energy state.

Shreya Ramineni 2L
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Joined: Fri Sep 29, 2017 7:07 am

Re: Filling electron shells

Postby Shreya Ramineni 2L » Mon Nov 13, 2017 8:04 pm

4s is lower in energy than 3d, so it gets filled up first.


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