Which one of the following sets of quantum numbers does not correspond to an electron in the ground state electron configuration of a gas-phase calcium atom?
a. n= 1, l= 0, ml= 0, mS = +½
b .n = 2, l = 1, ml = 1, mS = -½
c. n = 3, l = 1, ml = -1, mS = +½
d. n= 3, l= 2, ml= 1, mS = +½e.n = 4, l = 0, ml = 0, mS = +½
Dont know how to approach this, steps please
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