What elements would have these quantum numbers.
n=2,l=1,ml=-,ms=-1/2
These quantum numbers correspond to the electron in the second energy level (n=2), with angular momentum quantum number l=1 (indicating an electron in a p orbital), magnetic quantum number ml=- (indicating the orientation of the p orbital) and spin quantum number ms=-1/2.
Therefore, the electron with these quantum numbers would be found in a p orbital in the second energy level, with a spin of -1/2.