Final answer:
The maximum number of electrons that can occupy the 4d set of orbitals is 10, as determined by the formula 2(2l + 1) where l for d orbitals is 2.
Step-by-step explanation:
The maximum number of electrons that can occupy the 4d set of orbitals is determined using the quantum mechanical principle which states that the maximum number of electrons that can be in a subshell is given by the formula 2(2l + 1).
For the 4d subshell, the quantum number 'l' (angular momentum quantum number) for 'd' orbitals is 2. Plugging this into the formula gives 2(2(2) + 1) which simplifies to 2(4 + 1) or 2 x 5, yielding a total of 10 electrons.
Therefore, the maximum number of electrons that can occupy the 4d set of orbitals is 10.