00:01
In this question, it gives us three different situations and asks regarding quantum numbers and asks if the quantum number description is specific to all atoms or is applied only to an atom of hydrogen.
00:17
The very first statement says the principal quantum number determines the energy of a given electron.
00:23
The principal quantum number is n.
00:25
And it describes the general energy of electrons relative to each other.
00:34
And so we can look at the idea of atoms that are on the first energy level where n equals 1.
00:43
In the first energy level, there's only one sub -level, the 1 -s, as opposed to in the second energy level where we see a 2s and a 2p.
00:56
And so the principal quantum number determines the energy of a given electron is only true for hydrogen because all other atoms have different sub -levels that have slightly different energies.
01:08
So for a, the principal quantum number determines the energy of a given electron is only true for hydrogen.
01:25
Our second statement describes the angular momentum.
01:29
The angular momentum quantum number determines the shape of an orbital.
01:34
And this is true for all atoms...
