## Question 2.43

$sp, sp^{2}, sp^{3}, dsp^{3}, d^{2}sp^{3}$

Lauren Huang 1H
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

### Question 2.43

When writing out the electron configuration for silver and antimony, why is 4d^10 before 5s when 4d^10 is after 5s in the periodic table?

Heesu_Kim_1F
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

### Re: Question 2.43

Professor Lavelle said in class that we can write it in both ways. I think the solution manual writes out from the lowest quantum number to the highest quantum number. He also mentioned that if he prefers a certain way, then he will make sure to let us know. Hope this helps!

mayra martinez 1D
Posts: 32
Joined: Fri Sep 28, 2018 12:17 am

### Re: Question 2.43

The only reason we write it that way is that you want to go from the lowest quantum number which is 4d^10 to the highest quantum number which is 5s.

Isabelle_Maletz_3E
Posts: 27
Joined: Fri Apr 06, 2018 11:03 am

### Re: Question 2.43

It doesn't matter too much but the main reason is basically to keep the electron configuration in numerical order so 4d would come before 5s.

Atul Saha 3D
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

### Re: Question 2.43

Technically, when the 4d orbital is occupied, it exists at a lower energy state than 5s orbital. However, the 5s orbital is technically filled out before the 4d orbital.

Much Joy,
Atul Saha