Which one of the following statement (s) is (are) correct?
A. The electronic configuration of Cr is [Ar] `3d^(5)4s^(1)`. (Atomic No. of Cr= 24)
B. The magnetic quantum number may have a negative value
C. In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (Atomic No. of Ag=47)
D. The oxidation state of nitrogen in `HN_(3)` is -3
