00:02
Hi there.
00:03
In this question, we are trying to determine a correct set of the first three quantum numbers for a 2p orbital.
00:11
Okay, so let's talk for a minute about the quantum numbers.
00:15
N is the principal quantum number, and that tells you the energy level.
00:24
So it is an integer ranging from one in theory to infinity, although we typically don't deal with it, anything greater than seven.
00:36
But that's the energy level.
00:38
So that is going to be the 2 into p.
00:43
So n equals 2 for this particular orbital.
00:51
Okay, the next one we want to talk about is the angular momentum quantum number l.
00:56
Nl describes the shape or the sub -level.
01:04
And l is an integer that ranges from zero to n -minus 1.
01:12
Let me write the word 2 in here.
01:13
So it ranges from 0 to n minus 1 in its values, and it has to be an integer.
01:22
So when l equals 0, that describes an s shape.
01:27
When l equals 1, that describes a p...