## Electron Configuration

$FC=V-(L+\frac{S}{2})$

Veronica Lu 2H
Posts: 89
Joined: Wed Sep 18, 2019 12:18 am
Been upvoted: 1 time

### Electron Configuration

I am confused as to how we should order the electron configurations. I recall the correct order being like 4s2 then 3d10. However, in the textbook and midterm solutions it shows them being 3s2 3p6 3d10 then 4s2 4p6 etc. Which is right??

charleejohnson1L
Posts: 99
Joined: Fri Aug 30, 2019 12:17 am

### Re: Electron Configuration

When you write the configuration, you write it in the order of lowest to highest energy level. :) I hope this helps, this is what Lavelle said during lecture.

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

### Re: Electron Configuration

4s would come after 3d!! In high school most of us learned to put the 4s before the 3d since they are in that order on the periodic table, but energy level wise the 4s would come after 3d. To put it simply, whenever you're doing electron configuration, put them in numerical order.

ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

### Re: Electron Configuration

Just remember to write them in numerical order, this is because of the energy levels.