Which of the following sets of quantum numbers represents the 19th electron of Cr(Z=24)-

Options

A. `(4,1,-1,+(1)/(2))`
B. `(4,0,0,+(1)/(2))`
C. `(3,2,0,-(1)/(2))`
D. `(3,2,-2,+(1)/(2))`

Answer

B

Explanation

Electronic configuration of `Cr:[Ar]4s^(1)3d^(5)` ltbgt 19th electron of this atom is in 4s orbital.