For 10 points, name this spherical electron subshell, whose name is an abbreviation for its historical name, "sharp."
This letter denotes the lowest unfilled electron subshell in copper, and while a subshell denoted by this letter is filled in manganese, the 3d subshell is not. Palladium is unique in that it (*) lacks electrons in this subshell at the fifth energy level. This subshell corresponds to a second quantum number of zero, and is the only one that exists at the first energy level. For 10 points, name this spherical electron subshell, whose name is an abbreviation for its historical name, "sharp."
This letter denotes the lowest unfilled electron subshell in copper, and while a subshell denoted by this letter is filled in manganese, the 3d subshell is not.
s