In the quantum-mechanical model of the atom, which of the following is NOT one of the four quantum numbers needed to specify the probable location of an electron?
A. Principal quantum number (n) which describes the energy level/distance from the nucleus
B. Heisenberg number (H) which describes the electron's position and momentum.
C. Angular quantum number (1) which describes the shape of an electron's orbital
D. Magnetic quantum number (ml) which describes the orbitals orientation in space