00:02
Hi there.
00:03
This question is giving us some sets of quantum numbers and wants us to determine how many orbitals are described by each of these combinations.
00:12
It's not number of electrons, it's number of orbitals.
00:17
All right, but to answer this, let's talk about the quantum numbers.
00:25
The principal quantum number is n, and that describes the energy level, and it can be any positive integer.
00:32
The next quantum number is, and that describes the energy level, and it can be any positive integer.
00:41
The next quantum number is, is the angular momentum quantum number l.
00:46
And it describes the sub level.
00:51
It ranges, it's an integer that ranges from zero, two, and minus one.
01:08
And furthermore, when l equals zero, that describes an s orbital.
01:12
When l equals one, that describes p orbitals.
01:15
When l equals two, it describes d.
01:17
And when l equals three, it describes f orbitals.
01:22
And the last quantum number that describes orbitals, is the magnetic quantum number m sub -l.
01:28
The very last quantum number, the spin quantum number, describes the spin of the electrons themselves, but the orbitals are described by the first three.
01:37
This is the magnetic quantum number.
01:39
It tells the orientation in space of the orbital, and it also must be an integer that ranges, in this case, from negative l to positive l.
01:57
So whatever l is, this ranges from negative l positive l.
02:02
So this gives us different numbers of orbitals for each of these sub -levels...