00:01
Let's try the electron orbital energy level diagram for selenium.
00:05
Seledium has 34 electrons.
00:08
So 34 electrons, and this would be 1s, 2s, 2p, 3s, 4s, 3d, 4p, that's as high as we need.
00:32
So we're going to look at the 17th, 23rd, and 33rd electrons.
00:37
So 1, 2, 3, 4, 7, 10, 11.
00:53
This is 17th electron.
00:55
18, 19 plus here.
01:17
And 34.
01:18
There's my 34 electrons for selenium.
01:21
So for the 17th electron, there are quantum numbers here...