Copper

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Krista Mercado 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Copper

Postby Krista Mercado 1B » Sat Nov 03, 2018 11:46 pm

Why is the ground state electron configuration of copper [Ar]3d^(10)4s^(1) and not [Ar]3d^(9)4s^(2)?

Mahir_Hasan2C
Posts: 60
Joined: Fri Sep 28, 2018 12:25 am

Re: Copper

Postby Mahir_Hasan2C » Sat Nov 03, 2018 11:53 pm

It is more stable to be in 3d10 in comparison to 3d9 as it is closer to the full shell.

Peter Nguyen 2I
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Copper

Postby Peter Nguyen 2I » Sun Nov 04, 2018 12:44 am

I believe it is that way because 3d9 has an unpaired electron which makes it unstable and 3d would rather have a full shell to stabilize it.

cara_cavarretta_3F
Posts: 32
Joined: Fri Sep 28, 2018 12:23 am

Re: Copper

Postby cara_cavarretta_3F » Sun Nov 04, 2018 8:44 pm

It helps me to think about it being more beneficial to have a full shell of 10 electrons rather than a full shell of 2 electrons. Remember this is also the case for Cr, in which a half shell of 3d5 with all electrons of the same spin is more stable than having a full 4s2 and 3d4.

Kunseo Yook 2E
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Copper

Postby Kunseo Yook 2E » Sun Nov 04, 2018 8:59 pm

Is this the same for every element below copper and chromium? And are there any other elements with this kind of exception?

EllaBerry
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Re: Copper

Postby EllaBerry » Mon Nov 05, 2018 10:32 pm

It is more stable when the 3d orbital is full, which it is when it is at 3d10.

sonalivij
Posts: 70
Joined: Fri Sep 28, 2018 12:27 am

Re: Copper

Postby sonalivij » Mon Nov 05, 2018 11:04 pm

Kunseo Yook 2E wrote:Is this the same for every element below copper and chromium? And are there any other elements with this kind of exception?


As you go down the periods, the elements are farther away from the nucleus and stop adopting this rule

Briana Perez 3A
Posts: 35
Joined: Fri Sep 28, 2018 12:23 am

Re: Copper

Postby Briana Perez 3A » Tue Nov 06, 2018 3:32 pm

It is an exception to the period table and just has to be memorized. Because the 3d orbital is so much larger than the 4s, it pulls one electron to fill its empty space and is therefore full. Essentially, it is more stable in this configuration.

Michael Nirula
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Re: Copper

Postby Michael Nirula » Tue Nov 06, 2018 5:44 pm

^Yeah, Cu and Cr are exceptions

Ian Marquez 2K
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Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 2 times

Re: Copper

Postby Ian Marquez 2K » Thu Nov 08, 2018 12:07 am

Also, it has been experimentally observed that half-filled subshells are more stable than predicted. The electron configuration exception of copper allows it to have half-filled subshells making it its most stable ground state and proper electron configuration.

shaunajava2e
Posts: 66
Joined: Fri Sep 28, 2018 12:26 am

Re: Copper

Postby shaunajava2e » Thu Nov 08, 2018 11:31 am

^^ the rule applies for copper and chromium and all elements under them in the 9th and 6th groups (however lavelle said in class we won't be going past the 4th period so we don't need to worry about any elements other than copper and chromium)


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