Your beginning point here is the electron construction for a floor state copper atom, i m sorry looks prefer this - i won"t use the noble gas shorthand notation because that this one
#"Cu: " 1s^2 2s^2 2p^6 3s^2 3p^ 3d^10 4s^1#
Now, electrons are gotten rid of from any atom in bespeak of decreasing power level. Merely put, the electron are removed from the orbitals that space highest in power first.
As girlfriend know, you have actually a total of 4 quantum numbers offered to describe the exact location of one electron that surrounds the nucleus, and the spin of stated electron.
So, let"s recognize the first electron that will be removed from a ground state copper atom and also write out its quantum number set.
As you have the right to see, the 4s-orbital is highest in energy, since it"s located on the fourth energy level. This means that the electron the occupies this orbital will certainly have#n=4 -># situated on the fourth energy level#l =0 -># located in the s-subshell#m_l = 0 -># situated in one s-orbital#m_s = +1/2 -># it has spin-up
Removing this electron will cause the formation of the #"Cu"^(+)# cation, which has actually the complying with electron configuration
#"Cu"^(+): 1s^2 2s^2 3p^6 3s^2 3p^6 3d^10#
Now, the third electron that is eliminated from the neutral copper atom is indistinguishable to the second electron gotten rid of from the #"Cu"^(+)# cation.
The orbitals highest in energy are now the 3d-orbitals. Vital thing come remember is the you will remove electrons from completely filled 3d-orbitals first, then move on come half-filled 3d-orbitals.
So, the quantum number set that describes this electron will be#n=3 -># situated on the third energy level#l=2 -># located in the d-subshell#m_l = -1 -># situated in the #3d_(xy)# orbital#m_s = -1/2 -># has actually spin-down, because it"s assumed that the an initial electron put in an north orbital has #m_s = +1/2#
Now to remove the fourteenth electron from a neutral copper atom.
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As you deserve to see, in a neutral copper atom, the 3d-subshell has a full of #10# electrons, #2# per orbital.
This method that remove the first #11# electrons from the neutral copper atom will leve you through
#"Cu"^(11+): 1s^2 2s^2 2p^6 3s^2 3p^6#
Notice that removing #2# electrons an ext will leaving you with
#"Cu"^(13+): 1s^2 2s^2 2p^6 3s^2 3p^4#
Finally, you have the right to say for certain that the fourteenth electron will certainly be gotten rid of from a 3p-orbital that is completely filled, since the last 2 electrons come from totally filled 2p-orbitals together well.
You have the right to thus say the the quantum number set for this electron will certainly be#n=3 -># once again, located on the 3rd energy level#l=1 -># located in the p-subshell#m_l = 1 -># situated in the #2p_z# orbital#m_s = -1/2 -># has actually spin-down because it"s the very first electron come be gotten rid of from that particular orbital