00:11
So for this question, we're given a set of quantum numbers and asked to determine which ones are valid.
00:17
So let's go ahead and go through the rules again.
00:20
N can range from any number above 1 that is an integer.
00:33
L ranges from 0 to n minus 1.
00:39
And m subl ranges from negative l to positive l.
00:45
So let's go ahead and go through these.
00:47
We have n equals 3, which makes sense.
00:50
It's above 1 and it's an integer.
00:52
We have l equals 3, and we have to stop here.
00:55
Because based on n equals 3, we should know that l can only be 0, 1, or 2.
01:02
2 being the highest.
01:05
So because here we have l equals 3, it doesn't follow the rule that we just wrote to the right.
01:09
So this is not valid...