👉 In quantum mechanics, a triradii is an orbital angular momentum (OAM) quantum number that represents a system's overall angular momentum. It is determined by the spin of the electron in the outermost shell. The value of this quantum number determines the shape and orientation of an orbital, which can have different values depending on whether it is spherical or cylindrical. The triradii are typically represented as letters R, L, and M, with R being for radial (outer), L
