- #1
fluidistic
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Homework Statement
Write down the electonic configuration for the O atom. Write down the quantum numbers [itex](n,l,m_l,m_s)[/itex] for each one of the electrons.
Homework Equations
Pauli exclusion principle. Least energy principle for filling the shells.
The Attempt at a Solution
[itex]1s^22s^22p^4[/itex].
I have trouble for the electrons on the 2p shell.
The quantum numbers of the electrons are:
(1,0,0,1/2)
(1,0,0,-1/2)
(2,0,0,1/2)
(2,0,0,-1/2)
Here I am not sure:
(2,1,0,1/2)
(2,1,0,-1/2)
And 2 more electrons but I really don't know which quantum numbers to choose. They all have the same energy (degenerated). An external magnetic field would solve some degeneracy (the [itex]m_l[/itex] one, not the [itex]m_s[/itex] one).
So...
[itex](2,1,\pm 1 , \pm 1/2)[/itex] and [itex](2,1,0 , \pm 1/2)[/itex] are all possible for the 4 electrons.
However if I apply an external magnetic field, I can discard [itex]m_l=1[/itex], right?