Electron Configuration

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sarahtang4B
Posts: 132
Joined: Fri Sep 28, 2018 12:27 am

Electron Configuration

Postby sarahtang4B » Sun Oct 28, 2018 1:29 pm

when do we know if an electron fills the d shell and not the s shell first. like why do we skip 4s2 sometime and jump to 3d10 shell?

804991762_4A
Posts: 47
Joined: Fri Apr 06, 2018 11:04 am

Re: Electron Configuration

Postby 804991762_4A » Sun Oct 28, 2018 1:36 pm

It's not that we skip 4s2, but rather its because we have to put in order of lowest energy to highest and 4s2 has a higher energy than 3d, therefore it will be []3d4s

danicatran4
Posts: 35
Joined: Fri Sep 28, 2018 12:17 am

Re: Electron Configuration

Postby danicatran4 » Sun Oct 28, 2018 9:45 pm

But in what instance would 3d (or any d orbital) have a lower energy than s? Is it all the time?

Mariah Hill
Posts: 23
Joined: Fri Sep 28, 2018 12:28 am

Re: Electron Configuration

Postby Mariah Hill » Sun Oct 28, 2018 10:19 pm

Why does 3d have a lower energy the 4s?

nataliefgarcia3I
Posts: 22
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron Configuration

Postby nataliefgarcia3I » Sun Oct 28, 2018 11:07 pm

Can someone please explain this because I am also confused.

Jewelyana3A
Posts: 31
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron Configuration

Postby Jewelyana3A » Sun Oct 28, 2018 11:12 pm

I was also confused about the correct order and way to write the electron configuration. I would definitely ask a TA for clarification, but I think that there are just two ways to write it. For example, for Cobalt you can write [Ar]3d^74s^2 or [Ar]3d^9. Again I'm not complete certain, but it may be just two ways of writing it.


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