A. Size of orbitals
B. Shape of orbitals
C. Orientation of orbitals
D. All of the above
| Quantum Number | Symbol | Possible Values | Physical Meaning |
| Principal quantum number | n | 1, 2, 3, … | Ø Energy level or shell of an electron |
| Azimuthal quantum number | l | 0, 1, 2, …, (n-1) | Ø Shape of the orbital or subshell of an electron
Ø the orbital angular momentum quantum number, or subshell number. |
| Magnetic quantum number | ml | -l, -(l-1), …, 0, …, (l-1), l | Ø Orientation of the orbital in space |
| Spin quantum number | ms | +1/2, -1/2 | Ø Spin direction of the electron |
Submitted by :- Jamil Ahmed