Ans. The maximum number of electrons that can occupy an orbital is 2. In this case, the given quantum numbers (n=3, l=2, m=1) specify a specific orbital within the third energy level (n=3). Since the azimuthal quantum number (l) is 2, it corresponds to the d subshell, which has a total of 5 orbitals. Each orbital can accommodate a maximum of 2 electrons, so the maximum number of electrons that can occupy this orbital is 2.