Cu+ electron configuration

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105002507
Posts: 30
Joined: Fri Sep 28, 2018 12:15 am

Cu+ electron configuration

Postby 105002507 » Tue Oct 30, 2018 11:07 pm

I am confused on why the electron configuration of Cu is not [Ar]4s^2 3d^9. this is question 3.5 6th edition

Rachel Yoo 1F
Posts: 65
Joined: Fri Sep 28, 2018 12:24 am

Re: Cu+ electron configuration

Postby Rachel Yoo 1F » Tue Oct 30, 2018 11:19 pm

Since the question is asking for the electron configuration of Cu+ it means that Cu lost an electron. Originally it would be [ar]3d84s2 but the 2 electrons from the 4s shell move to the 3d shell making the electron configuration [Ar]3d10

Kate_Santoso_4F
Posts: 72
Joined: Fri Sep 28, 2018 12:29 am

Re: Cu+ electron configuration

Postby Kate_Santoso_4F » Tue Oct 30, 2018 11:24 pm

Cu+ would have a total of 28 electrons since you are losing one electron and Cu normally has 29 electrons. Argon is the nearest noble gas to Cu for the shorthand notation. Half filled and fully-filled orbitals are more symmetrical than any other configuration and symmetry leads to greater stability. Therefore, the electron configuration for Cu+ would be: [Ar] 3d^10. Hope this helps!


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