- #1

Denver Dang

- 148

- 1

When you have to decide the electron configuration for an atom you find the number of electrons in the shell as 2n^2 and the subshell by 2(2l+1).

If I'm not mistaken "the shell" is the total electrons in an atom, right ?

So for n = 1 it makes sense that there can be a total of 2 electrons. But for n = 2 it becomes 8, which makes sense because there is 8 atoms, leading to 8 electrons, in the 2nd row. But if you take for n = 3 you get 18. But in the 3rd row, there is only 8 new atoms as well. So I can only get 18 by adding the electrons from n = 1, n = 2 and n = 3. But if that is correct, why didn't I add n = 1 when I looked at n = 2 ? If you ask me it should have been 10 :/

So, if you know what I'm talking about, am I doing wrong here ? :)

I'm just confused :/